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49 Best 5 watt aquarium heaters in 2022: According to Experts.

You could get any random 5 watt aquarium heaters, but if you’re looking for expert advice on choosing the best one for your needs then you’ve arrived at the right place.

It doesn’t matter what your 5 watt aquarium heaters needs are or what your budget is, because I’ve done an in-depth analysis to include the best-rated options suitable for diversified usage needs and different budget ranges.

To make this list, I’ve spent 94 hours researching 5 watt aquarium heaters from the best brands such as: hygger, Cobalt Aquatics, Hydor.

Note: Make sure that option you’re choosing has all the features you need. Afterall, is there any point in purchasing something that’s not usable?

49 Best 5 watt aquarium heaters in 2022: After 94 Hours of Research

To make this list an unbiased resource for choosing the best 5 watt aquarium heaters, I contacted 24 experts and discussed various aspects to consider. After a huge discussion, I went across customer reviews, researched the reputed brands, and a lot of other things. Because my aim is to recommend products that are highly value for your money.

1. Cobalt Aquatics 31020 5W Mini-Therm Heater,White/Black,Cobalt Aquatics Mini-Therm Heater, 5 watt -Pet Supplies

By Cobalt Aquatics

  • Shatterproof Design
  • Compact for small aquarium
  • Round Design
  • Fully Submersible

2. Aqueon Mini Aquarium Heater, 10 Watts, Up to 5 Gallons -Pet Supplies

By Aqueon

  • Fully submersible in a compact size
  • Ideal for desktop aquariums 2.5 to 5 gallons
  • Shatterproof and nearly indestructible
  • Thermal safety shut-off

3. Aqueon 100101230 Flat Submersible Heater, Black,7.5W, up to 3 gallon -Pet Supplies

By Aqueon

  • Fully submersible
  • Shatterproof construction
  • Can be used with glass or acrylic enclosures
  • Quick and easy installation
  • Warms aquarium water up to 6°F above ambient room temperature
  • 7.5 Watt works best for 1 to 3 gallon fish tanks
  • Note: Do NOT operate or leave product plugged in when it is outside of water
  • Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank

4. Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt -Pet Supplies

By Tetra

  • Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies
  • It will be red when heating and green when the proper temperature has been reached.
  • The HT heater is fully submersbile and can be installed vertically or horizontally
  • DO NOT plug heater into an electrical outlet until it is placed inside the aquarium.
  • All Tetra HT heaters have indicator lights to let you know when the heater is on
  • No adjustment is requried.
  • The HT10 uses a built in electronic theromstat to automatically maintain water at 78° F which is ideal for most tropical fish
  • It’s small footprint makes it easy to conceal behind plants or other décor.
  • Please read all label information upon delivery

5. AQQA Mini Submersible Aquarium Heater 15W,79℉(26℃) Constant Temperature Intelligent Automatic Heating,Small Fish Tank Heater with LED Light,for Freshwater and Saltwater (25W) -Pet Supplies

By AQQA

  • Different lights have different meaningsThe red lights represent heater is on heating,red LED light flashes rapidly represent the heater is exposed to air, the green light represent the temperature of the water is higher than 79℉( 26℃) heating will stop.the green LED light flashes quickly represent temperature passes 97℉(36℃).
  • Dry burning-resistant protection and over temperature protectionWhen temperature passes 97℉(36℃),the heater will shut off automatically.When the heater is exposed to air, the heater shuts off automatically.heater heating 30 minutes, the heater stops for 3 minutes; the red led light flashes twice every 9 seconds.
  • Mini size,perfect for small fish tanks3.3 x 2.2 x 0.8 inch Super small,but powerful.All the heating tubes are in the insulating material.Prevent the heater from being too hot and the fish from being scalded.The heating tube is not exposed and explosion-proof carbon heater,it is very safe that no small fish can touch the heating tube.
  • Suitable for freshwater and saltwaterThe heater must be completely immersed in water while in use.When you need to take the heater, be sure to wait for the heater to cool down before touching it to avoid being burned.One year warranty, please rest assured to buy.
  • Intelligent automatic heating,constant temperature 79℉(26℃)Keep the water temperature at 79℉(26℃),the most comfortable temperature for the fish.When the water is lower than 77℉ (25℃) the heater turn on and heat the water,If the water is higher than 79℉(26℃) the heating will shut off.

6. VIBIRIT Aquarium Heater,Betta Fish Tank Heater 25W Smart Small Aquarium Heater,Energy Efficient Submersible Thermostat + Thermometer Sticker -Pet Supplies

By VIBIRIT

  • 25W Fish Tank Heater is suitable for 3 to 5 gallons and can be used in mini fish tanks and aquariums
  • Included Temperature Sticker You can stick the temperature sticker on the outer glass
  • It has anti-explosion, anti-scalding function, high temperature resistance and high safety
  • The super-designed suction cups hold the heater tightly in the aquarium
  • Temperature bar is for reference only.
  • Suitable for aquarium pets such as turtles and fry.
  • This product aquarium heater has passed CE, ROHS, FCC certification
  • Parameters and Quality Assurance working power 25w, frequency: 50/60Hz, voltage: 110-120V, waterproof rating IP68
  • Easy to hide in the water tank.
  • Fully Automatic Temperature Control ChipVIBIRIT submersible aquarium heater automatically adjusts the temperature between 75°F and 82°F (24°C to 28°C)
  • And will automatically turn on/off to achieve the setting temperature constantly and stably, Energy-efficient.
  • Advanced Materials sturdy engineering plastic
  • The easy-to-recognize blue color indicates the current temperature of your aquarium water
  • Explosion-proof, waterproof, anti-scalding, high temperature and other safe operation.

7. PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks -Pet Supplies

By PULACO

  • How it Works: Plug in, red light turns on, the heater will start working until water temperature up to 78°F, and red light off, then the green light will turn on, heater stop working and keeping constant temperature 78°F
  • Quick and Easy Installation:Vertical or horizontal placement using, Aquarium heater automatic temperature control 78℉, no need to adjust temperature, easy to operate, fishes happy.
  • Accuracy:±3°F
  • Betta HeaterThis Fish Tank Heater should be 100% submerged into water, Ideal for small glass or acrylic desktop aquariums up 1 to 6 Gallons, not suitable for less than 1 gallon tank.
  • Note: Do not operate or leave product plugged in when your water tank is out of water, heater should be fully submerged into water
  • In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement
  • It is better to install a water pump to help water circulating while heating.
  • SATISFACTION GUARANTEEDOur Aquarium Heater is built with durability in mind and safety for every design
  • 12 Month Warranty and 24 Hour Professional After-sales Service.

8. DaToo 10 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 1 Gallon 1.5 Gallon -Pet Supplies

By DaToo

  • Now DaToo Mini Aquarium heater can help you solve this problem
  • This not only affects us to watch our beautiful Betta, but also reduces the activity space of the Betta
  • Only for fresh water tanks
  • Because most of the heaters on the market are too big for this small tank
  • Ultra-small and thin size, perfectly hidden in a 1~1.5 gallon tank, your Betta will be happy with it! !
  • CONSTANT TEMPERATURE & NO NEED TO ADJUST – DaToo 10W MINI Aquarium Heater can automatically maintain a constant temperature between 75°F and 82°F (depending on the external environment), no need to set
  • PERFECT MINI HEATER FOR 1~1.5 GALLON TANK – For a Betta breeder with a 1 to 1.5 gallon small tank, it is very difficult to choose a suitable heater
  • ATTENTION & ONE YEAR WARRANTY – This is 10W MINI Aquarium Heater, size is 3*2*0.26 inch, fit 1~1.5 gallon small tank
  • Very energy efficient and environmentally friendly
  • JUST DO IT, Let’t Go!!
  • No need to worry about leakage, you can rest assured to use it for your children
  • The Betta heater needs to be completely submerged in the water
  • This temperature range is ideal for most tropical fish and is very beneficial for the reproduction of betta and promotes their metabolism
  • Great for kids!!
  • Buy DaToo products with confidence
  • One Year Warranty and 100% Money-back Guarantee
  • If it leaves the water, it will automatically stop heating to prevent dry burning (heating indicator is green), which is very safe.
  • 24V SAFE VOLTAGE & POWER OFF AFTER LEAVING WATER – The output voltage of the DaToo Betta Heater is only 24V, which not only ensures the safety of the fish, but also ensures the safety of the user
  • Your child can operate it easily and is very safe
  • This mini fish tank heater is only suitable for fresh water tanks.
  • PTC HEATING & ONLY SUITABLE FOR FRESHWATER – Unlike conventional glass aquarium heaters, PTC has better thermal conductivity and heating rate, no explosion, no breakage
  • With no extra work, just plug it in and the DaToo 10Watt Small Fish Tank Heater will help your fish stay healthy and comfortable

9. FREESEA 50 Watt Aquarium Submersible Betta Heater with Aquarium Submersible Thermometer -Aquarium Heaters

By FREESEA

  • SATISFACTION GUARANTEED: Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement
  • Heater rod is suitable for people over 16 years of age
  • Temperature range: 63°F~95°F , It is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time.
  • Aquarium heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.,Please unplug the power supply when cleaning the fish tank or aquarium water changes
  • 50 Watt Heater: This Aquarium heater is suitable for 5 to 15 gallons aquariums, Length – 6.8 inch,voltage 110-120V, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.
  • Intelligent temperature control:Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating
  • Furthermore, Automatic safety shut-off feature, and overheating protection.
  • 12 Month Warranty and 24 Hour Professional After-sales Service.
  • Note: 1
  • Children or minors should be under adult guidance or supervision.

10. PULACO 25W Mini Aquarium Heater with External Controller & LED Temperature Display, Adjustable Submersible Betta Fish Tank Thermostat -Pet Supplies

By PULACO

  • It can be used for 1-5 gallon glass or acrylic fish tanks.
  • SATISFACTION GUARANTEEDOur Aquarium Heater is built with durability in mind and safety for every design
  • It is better to install a water pump to help water circulating while heating.
  • Easy to operate: This heater is different from traditional heaters
  • 12 Month Warranty and 24 Hour Professional After-sales Service.
  • It is designed with an external controller for temperature display and temperature adjustment, which can freely adjust the temperature you need (68°F-93°F).
  • Intelligent temperature control: The heater effectively maintains the temperature you preset before, and stops heating when the water temperature reaches the preset temperature, and restarts heating when the water temperature is lower than the preset temperature by 2-3°F.The red light on the LED screen indicates that the heater is heating, and the blue light indicates that the heater has finished heating and is in a constant temperature state.
  • Note: Do not operate or leave product plugged in when your water tank is out of water, heater should be fully submerged into water
  • In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement
  • Quartz glass heater: The heating device is made of heat-resistant quartz glass, explosion-proof and strong thermal conductivity

11. SALUTE Aquarium Heater Submersible Auto Thermostat Heater, (50W/100W/200W/300W) Fish Tank Heater and Adjustable Temperature with 2 Suction Cups Suitable for 10-115 Gallon Fish Tank -Pet Supplies

By SALUTE

  • Note: 1
  • Precisely Temperature Control: Automatic constant temperature function,with An intelligent chip controls the fish tank heater temperature, making the temperature difference within ±1℃/±2ºF; SALUTE will always maintain this comfortable temperature for your beloved fishes!
  • Heater rod is suitable for people over 16 years of age
  • Satisfaction GuaranteedOur Fish Tank Heater is built with durability in mind and safety for every design
  • Children or minors should be under adult guidance or supervision.
  • Temperature range: 63°F~95°F , It is very easy-to-adjust the temperature you need, and also easy-to-observe the water temperature of the fish tank at any time.
  • 12 Month Warranty and 24 Hour Professional After-sales Service.
  • In the remote possibility or chance that you’re not satisfied with our product, just contact us, and we will glad to offer a free replacement or a fully refund
  • Aquarium heaters are 100% submersible use only, during its heating time, heater must be 100% submerged into the water
  • 100 Watt Heater: This Aquarium heater is suitable for 10 to 20 gallons aquariums, Length – 10.4 inch, Voltage 110-120V, Power cord length – 51.0 inch, please choose the right wattage aquarium heater according to our size chart.
  • Please unplug the power supply when cleaning the fish tank or aquarium water changes

12. Hydor 7.5w Slim Heater for Bettas and Bowls, 2 to 5 gal -Pet Supplies

By Hydor

  • Helps guarantee your fish a healthy life by promoting the ideal water temperature.
  • Can be positioned under gravel
  • Heater is UL listed
  • Plug and Play, No temperature to set
  • No glass components

13. BOEESPAT Small Aquarium Heater 50W Fish Tank Heater for 5/10 Gallon Betta Fish with LED Temperature Controller and Smart Thermostat -Pet Supplies

By BOEESPAT

  • With 2 strong suction cups at the back side of the betta heater, it’s easy to install it on to glass, acrylic or plastic tank
  • The tank heater will stop heating when the water temp reaches to set temp, it will restart to heating when the water temp is 1℉ off the set temp
  • After putting it in the water again, the fault disappears and normal operation resumes.It is a safe and reliable water heater tank
  • The led will display the set temp digit only when you press the controller
  • Shut off When Out of WaterBOEESPAT aquarium heater adopt newest technology, it is a fully submersible aquarium heater for fresh water and saltwater tank, when the top part of betta fish heater is out of water it will be forcibly stopped
  • Every time you set your betta fish heater, just press the button over and over until it reaches to your desired temp, then stop and wait the digit flashing for 3 times, then setting is done
  • The heater with a built-in thermometer, when temp setting is done, the led will show the water temp all the time
  • Reliable ThermostatThis heater for fish tank also can as an ideal turtle tank heater(because it can adapt to water level as low as 1.6inch) after finishing the temp setting, it will maintain the tank water at the temp you set
  • Digital DisplayWith led display on the midle of the betta heater front side, when the fish tank heater is heating, there indicator light above the digit is on red, when it stop heating, the light is blue
  • The power cord is 5ft, long enough for use indoors
  • Small Aquarium Heater with External ControllerYou can set the temperature outside the fish tank through the external controller, and the fish tank accessories of temperature sensing built in will cyclic heating the tank water automatically .Temp range from 65℉ to 93℉
  • 50W tank heater is for 3-10gallon, 100W tank heater is for 10-20 gallon
  • 50W Compact Fish Heater110-120V/60HZ square shape design small aquarium heater, fast heating for small fish tank

14. FREESEA 50W Mini Aquarium Heater Fish Tank Submersible Heater with LED Temperature Display -Pet Supplies

By FREESEA

  • Touch button, cyclic adjust temperature , easy to use and Safety.
  • Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating.
  • SATISFACTION GUARANTEEDGain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement
  • Temperature range: 59°F~94°F, display Fahrenheit °F, this heater is designed for1~10 gallons tank.
  • Note:this heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.
  • 12 Month Warranty and 24 Hour Professional After-sales Service.

15. Uniclife Aquarium Heater Submersible with Thermometer, 25 Watt for 5 Gallon Fish Tank -Pet Supplies

By Uniclife

  • Red rotatable knob on top for adjusting the temperatures between ranges of 68°F-93°F
  • Come with Uniclife aquarium heater x 1; Suction Cups x 3; stick-on thermometer x 1(The color of number will change to blue to indicate the temperature).
  • Water-tight with IP68 sealing workmanship
  • Please notice the red indicator light is on while working, will automatically turn off when temperature reached
  • Ideal for 5-15gal fish tanks, can be installed in both fresh and saltwater.
  • Recommend testing before introduce to fish.
  • Fix the heater tightly to the tank in vertical or horizontal with 3 strong suction cups
  • Carefully check external condition before use
  • Shatterproof 2 mm extra thick quartz glass prevents electricity leakage and scratching
  • Measures 8.2″ x 1″ (L x D)
  • Visible temperature displayed allows accurate temperature maintain.

16. hygger 50W Mini Inline Quartz Glass Aquarium Heater with External Controller, Adjustable Submersible Betta Fish Tank Thermostat for 5-15 Gallon -Pet Supplies

By hygger

  • Automatic Stop & RestartEffectively maintain the tank water in the constant temp you set, stop heating when water temp reaches to the set temp and restart heating when the water temp is 1-2℉ below the set temp.The indicator light on the controller will be on red when it’s heating, will be off when it stop heating
  • Perfect for betta tank
  • For Fish Tank 5-15 gallon50W aquarium heater, voltage AC110-120V 60HZ, power cord is 4.6ft
  • With Built-in Thermometeryou can set the the temp from 68℉ to 90℉,temp exactness is within 2 degrees in fahrenheit
  • Heater rod length is 5 inch, mini compact heater for small fish tank use
  • There is a built-in thermometer in the heater to detect the water temp, not need to buy seperate thermometer
  • A very compact heater, easy to hide in the tank
  • Durable Quartz Glassthis aquarium heater tube is heat-resistant quartz glass made, excellent in explosion-proof, can be used in fresh water and salt water aquariums, white alundum sand as the heat-conducting media, service life can be 3 years or more
  • Fully Submersiblethis fish tank heater is waterproof, must be fully submerged in water when working, place it horizontally or vertically near the water intake or where the way of water flow

17. Aqueon Aquatic Flat Heaters 15 Watts,Black -Pet Supplies

By Aqueon

  • Fully submersible
  • Note: Do NOT operate or leave product plugged in when it is outside of water
  • Quick and easy installation
  • Shatterproof construction
  • Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank
  • 15 watt is best for 4 to 10 gallon fish tanks
  • Warms aquarium water up to 6°F above ambient room temperature
  • Can be used with glass or acrylic enclosures

18. PGFUNNY 25W Aquarium Heater, Fish Tank Heater for Betta Smart Thermostat, Slim Design Fit 3 to 5 Gallon Tank, with Thermometer Strips -Pet Supplies

By PGFUNNY

  • Advanced MaterialsThe small betta heater is made of sturdy engineering nylon and glass fiber, which is flame retardant, constant and stable
  • When the water temperature is lower than 77℉, It will start to heat; when the water temperature is higher 82℉, the heater will automatically turn off.
  • If there is an area of sand or decoration in your tank, the water volume will lower than the tank bulk, you need to select another lower power heater to ensure it will not overheat.
  • Note: The temperature strips should stick on the outside of the fish box and level with the heater
  • Suitable for 3-5 Gallon Tank: The 25W fish tank heater design fit for small fish tanks which can contain 3 to 5 gallons of water
  • Anti-explosion, Waterproof, Scald-preventing, safe operation for pet betta fish
  • Fully Automatic Temperature Control Design: The Aquarium heater equipped automatic temperature control system, The temperature regulates automatically between on 77℉ – 82℉ depends on the water temperature in your fish tank
  • Come with Thermometer Strips: By using the Thermometer Stripe, you will be able to monitor
  • due to the different materials of glass, the shown temperature may be delayed.
  • Quality Assurance: This product fish tank heater has certificated by CE, ROHS, FCC, and UL1018
  • An easy to identify blue color shows the current temperature of your aquarium water
  • Working power 25w, frequency: 50/60Hz, voltage: 110-120V, waterproof rating IP68.
  • the energy-efficient heater measure 5.35“ * 0.9” * 0.63“(L*W*H) suitable for aquarium pets such as turtles and fry.
  • Temperature Stripe is for reference only

19. Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 -Pet Supplies

By Fluval

  • Aquarium heater that blends into the aquarium environment with built-in reflective technology that mirrors the surrounding colors
  • Computer-calibrated thermostat and easy-to-adjust temperature control dial
  • 50-watt heater suitable for freshwater and saltwater aquariums up to 15 gallons with a 3-year warranty
  • Easy to install with slim profile tube for easy placement
  • Shock resistant Borosilicate glass and high density ceramic heat sick

20. Bnzaq Fish Tank Aquarium Heater – Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W -Pet Supplies

By Bnzaq

  • [ATTENTION]Please place the heater near place (filter or pump) of water flowing to keep more even water temperature.Unplug the heater 30 minutes early when changing the water for the fish tank.
  • [AUTOMATIC CONSTANT TEMPERATURE]When water temperature reaches set value,the indicator light will be OFF and the heater will automatically stop heating.The heater will automatically start heating and indicator light will be ON if water temperature is low.You could place heater horizontally or vertically.
  • [ADJUSTABLE TEMPERATURE]Temperature range: 68°F~93°F.25W heater:suitable for fish tank within 7 gallons,Length:7.8″.Easy to adjust temperature by the aquarium heater that suit more species of fish.
  • [NO LONGER CHILL YOUR FISH]Automatically regulate and maintain water temperature,imitate the original ecological environment for your tropical fish.Provided fish with warm water environment.Perfect to apply to fresh and salt water.
  • [PREMIUM SHATTERPROOF GLASS]Made of shatterproof glass and BPA-free plastic.Bnzaq aquarium heaters are fully submersible and safe for fish without any toxic substance producing.3 FREE artificial aquarium plants as ornament in your tank.

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21. Orlushy Submersible Aquarium Heater,100W Adjustable Fish Tahk Heater with 2 Suction Cups Free Thermometer Suitable for Marine Saltwater and Freshwater -Pet Supplies

By Orlushy

  • It’s not exactly accurate but it turns easy and can be adjusted at small intervals
  • Automatic shut off when the temperature is reached
  • It shows an area to adjust the temperature
  • Explosion Proof: 2mm thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank.
  • Precise temperature dial from 68 to 89°F allows for complete control of aquatic climate within a 1-degree difference.
  • 100W aquarium heater is suitable for 10 to 20 gallons aquariums,Length – 9″,voltage 110-120V, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart.
  • Adjustable Aquarium Fish Tank Water Heater Sensitive and reliable thermostat maintains uniform temperature

22. DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker -Aquarium Heaters

By DaToo

  • Buy With Confidence!
  • 25W Betta Aquarium Heater — Creating and maintaining a perfect and comfortable water temperature for our cute fish is not easy, which requires a lot of effort
  • Quartz glass material, explosion-proof and crack-proof, more sturdy and durable, without worrying about damage.
  • When in use, it needs to be submerged 100% in water
  • This temperature is very suitable for betta and most tropical fish
  • We provide one year warranty and 24 hours professional customer service
  • The Smallest 25W Betta Heater — For most fish lovers who have small fish tanks of 1 to 5 gallons, a small heater means more space for fish
  • You will find it very easy and happy to take care of pet fish!
  • Very MINI!!
  • Safe And Durable — Unlike traditional plastic seals, DaToo uses a rubber sealing layer, which ensures that DaToo has better sealing and safety performance, and will never leak electricity or water
  • One Year Warranty & Satisfaction Guarantee — This heater is ideal for 1 to 6 gallon small glass or acrylic desktop aquariums
  • Precise And Constant Temperature — No need to set, DaToo Fish Tank Heater will automatically keep the water temperature of the fish habitat at 78℉
  • Precise and constant temperature, no need to set, keep the temperature of fish habitat in the best state at all times
  • When the water temperature is lower than 78℉, the heater starts to heat and the red light is on
  • DaToo will always maintain this comfortable temperature for your beloved fish!
  • This is the smallest 25W aquarium heater on the market, only 0.2 inches
  • No matter how small your fish tank is, it can be used perfectly in it, and you can’t even find it
  • Now DaToo MINI 25W Aquarium Heater can help you make this easier
  • When the temperature reaches 78℉, the heater stops heating and the green light is on

23. hygger 50W Mini Submersible Digital Display Aquarium Heater for Small Fish Tank, Compact and Fast Heating Thermostat, with External Controller and Built-in Thermometer, for Betta, Turtle -Pet Supplies

By hygger

  • Compact Small Heater110-120V/60HZ oval shape design little aquarium heater, fast heating for small fish tank
  • 50W tank heater is for 1-6.5gallon, 100W tank heater is for 6.5-13 gallon
  • Digital Displaywith led display on the midle of the heater front side, when the fish tank heater is heating, there indicator light above the digit is on red, when it stop heating, the light is off
  • External Controllereasy to set the temp on the controller, only show farenheit temp, you can set the temp range from 63℉ to 94℉, temp accuracy 1℉
  • The led will display the set temp digit only when you press the controller
  • Every time you set the temp, just press the button over and over until it reaches to your desired temp, then stop and wait the digit flashing for 3 times, then setting is done
  • Keep the controller away from water, it’s not waterproof
  • The tank heater will stop heating when the water temp reaches to set temp, it will restart to heating when the water temp is 1℉ off the set temp
  • Heater Dimension: 2.7×1.4x 4.5 inch
  • The heater with a built-in thermometer, when temp setting is done, the led will show the water temp all the time
  • If the water temp is over 95℉, the heater will auto shut off and led displaying HH, it will work normally again when the water temp is lower than 95℉
  • Reliable Thermostatthis an automatic aquarium thermostat, after finishing the temp setting, you can be confidence on that it will maintain the tank water at the temp you set
  • With 2 strong suction cups at the back side of the betta heater, it’s easy to install it on to glass, acrylic or plastic tank
  • The power cord is 5ft, long enough for use indoors
  • Shut off When Out of Waterplease note that this a fully submersible aquarium heater for fresh water and saltwater tank, when the top part of the heater is out of water it will auto shut off and the led displaying E1, when fully in water again it will return to normal work again

24. DaToo Small Aquarium Heater 50W Mini Fish Tank Heater 50 Watt Submersible with LED Temperature Display -Pet Supplies

By DaToo

  • They can freely play around in the water without worrying about the cold, which will make them healthier and more energetic
  • No need to worry about overheating.
  • Convenient Temperature Display & Adjustment — Real-time temperature display, DaToo heater can accurately display real-time water temperature, no need to buy an extra thermometer, save you money
  • Accuracy is ±1℉
  • DaToo 50W Small Aquarium Heater — A warm water temperature can always bring happiness to the fish
  • Suitable for fresh water and salt water
  • When the water temperature is lower than the set temperature, the heater will automatically start heating
  • One Year Warranty & Satisfaction Guarantee: This is a 50W small size heater, ideal for 2~10 gallon aquariums
  • External temperature controller, just press it gently outside the fish tank, you can get the temperature you want, will not scare your cute fish
  • Very convenient!
  • Buy With Confidence!
  • Thicker quartz glass, explosion-proof and crack-proof, safer and more durable, excellent heat transfer rate, which enables DaToo aquarium heaters to quickly fill every corner of your fish tank with warmth!
  • Sturdy And Durable — High strength ABS shell, no fear of any external force damage and chemical corrosion, high temperature resistant, longer service life
  • Three-Point Temperature Control System — DaToo creatively uses three temperature sensing points, which makes DaToo heater has more accurate and sensitive temperature
  • When in use, it needs to be submerged 100% in water
  • DaToo 50W aquarium heater, three-point temperature control system, sturdy and durable, real-time temperature display and external temperature adjustment, safe and easy to use, not only can easily create a warm underwater world for your fish, but also bring them happy.
  • Automatic constant temperature, when the water temperature reaches the set temperature, the heater will automatically stop heating
  • We provide one year warranty and 24 hours professional customer service

25. Aqueon Fish Tank Mini Heater, 10-watt, Plastic -Pet Supplies

By Aqueon

  • Aquarium heater is shatterproof
  • Perfect size heater for Aqeuon Mini Bows and other small aquariums
  • Features thermal safety shut-off
  • Ideal for desktop fish tank aquariums up to 5 gallons

26. NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Wireless Remote Control, Suitable for Freshwater & Saltwater Tank from 15-25 Gallon, 100W -Pet Supplies

By NICREW

  • The heater will turn off once it rises above the preset temperature and turns back on once it cools down, making it safer for you and your fish
  • Easy-to-use wireless remote allows you to set the temperature 1 degree per time, knowing the use time by pressing the H button
  • Advanced suction cups make horizontal or vertical installation quick and easy, the cups also provide maximum hold to prevent movement by active reptiles
  • Ideal for freshwater and saltwater aquariums, glass containers, and hydroponic systems
  • 100-Watt heater is designed for 15-25 gallon fish tanks

27. DaToo 25W Mini Aquarium Heater Betta Small Fish Tank Heater Submersible 3 to 5 Gallon, 1 Yr Warranty -Aquarium Heaters

By DaToo

  • Suitable for salt water and fresh water, ideal choice for small aquariums!
  • Waterproof and wireless, you can put it completely in water
  • Mini size, Perfect Temperature Control, let your cute betta have a happy and healthy winter!
  • Real-time Monitoring Of Water Temperature: DaToo provides you with a digital electronic thermometer for free
  • While providing the warm water temperature for betta, it can also maintain the beauty of the aquarium
  • When winter comes, it must want you to prepare a small tank heater for it
  • Intelligent Temperature Constant System: Unlike other traditional fish tank heaters, DaToo 25W small aquarium heater has a built-in DTN7 intelligent chip, which can automatically maintain the temperature between 75°F and 82°F
  • Electronic temperature display, just a quick glance, you can know the water temperature of your aquarium
  • DaToo 25 MINI Aquarium Heater Suitable for all kinds of aquarium pets, Betta, tropical fish, goldfish, ornamental fish and turtles
  • And DaToo 25W mini aquairum heater have been certified by FCC, CE and ROHS, which means the DaToo heater has great safety performance, giving your betta a safe and warm living environment!
  • Very convenient!
  • The Best 25W MINI Aquarium Heater For Betta: Water Temperature is a important factor that your betta is always concerned about
  • Perfect Size For Small Tank: DaToo heater is only 5.3 inches in length and hides perfectly in a small 3 to 5 gallon fish tank
  • Durable Materials And Safety Certifications: Excellent engineering-grade plastic shell and MCH heating ceramic, sturdy and durable, with explosion-proof, anti-cracking and hot-proof functions, greatly improving the high temperature resistance and safety of the heater
  • This is the ideal temperature to keep betta healthy! And DTN7 chip can effectively prevent overheating by controlling the heater on and off, let your bettas enjoy the warm winter without any worries!!

28. HITOP 25W 50W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cup (50W) -Pet Supplies

By HITOP

  • Adjustable and easy to use: This aquarium heater, adjustable temperature range 68 ~ 93 °F, after setting the temp you want, will on or shut off automatically when the water temperature changes, no extra adjustment is required.
  • Thickened Glass: 2mm thickened quartz glass, 33% thicker than 1.5mm normal aquarium heaters, much safer for human and your lovely fishes, your pets will no longer fear the winter.
  • Accurate Temperature Control: This fish tank heater built-in thermostat, will automatically keep the water at the set temperature within±2°F error
  • Besides, we provide 1 more extra suction cup for spare (total 3 PCS), and we provide 12 months warranty.
  • HITOP aquarium heater 50W, length 7.2-inch, power cord 4.9ft, designed for small fish tanks, recommended for aquariums up to 15 Gallons.
  • Comes with an sticker thermometer to detect water temp at any time.
  • Easier installation, you can install it with any angle by 2 powerful suction cups, just make sure it is under water fully

29. hygger 500W Aquarium Heater for Fresh-Water Salt-Water, with External Digital Display Thermostat Controller and Thermometer, Auto Quartz Submersible Heater for Fish Tank 60-120 Gallon -Pet Supplies

By hygger

  • With low profile black plastic guard, easy to hide in the tank
  • When the water temp is cool down to 1℉ less than the set temp, the tank heater will restart heating
  • Fully SubmergedThe heater tube and the separate sensitive thermometer must be completely submerged under water all the time
  • For long Time UseVery durable and explosion-proof aquarium heater, can be used for saltwater and freshwater aquariums, service life can be 3 years or more
  • Please unplug it and wait it to cool down before you removing the heater or doing water change
  • Auto on and off Reliable submersible aquarium heater
  • Fast heating up aquarium heater, it takes about 3 minutes to heat 3.5 gallon water up 3℉
  • To set the temp, just press the button over and over until the screen displaying the temp you desired, then stop and wait the digit flashing for 3 times, the setting is done and the led shows the current water temp again
  • Led Display ControllerOnly show Fahrenheit degrees
  • Quickly Heat UpVoltage 110-120V/60HZ, power 500W, US three-pin plug, heater rod length 10.5 inch
  • It will stop heating when the water temp reaches to the set temp, please note that the water temp may go up 1℉ more because of the waste heat

30. AQQA Submersible Aquarium Heater, 15W 25W 35W Min Fish Tank Turtle Tank Heater with 79℉(26℃) Intelligent Constant Temperature Controller for Freshwater and Saltwater Small Aquarium Tanks -Pet Supplies

By AQQA

  • We freely provide 1 year quality assurance for this product
  • NOTE: Please make sure that the heater is completely submerged in the water before turning on the power, and install it near the water flowing area to prevent uneven heating
  • Sensor open-circuited, red and green lights flash alternately, stop working
  • EASY INSTALLATION: Easy and quick installation, submersible fish tank heater, vertical or horizontal placement using attached 2 suction cups
  • When the temperature exceeds 97℉(36℃), the green light flashes quickly, the heater will shut off automatically
  • When the temperature is reached 79℉(26℃), it will stop work, the green light will be constant on
  • SAFE& DURABLE: Mini fish tank heaters made of high quality flame resistance, double seal material, providing explosion-proof, shatterproof, IP68 waterproof, much safer for human and your lovely fishes, your pets will no longer fear the winter
  • TRIPLE SECURITY PROTECTION: When the heater exposed to air and is not fully submerged, then the red light flashes quickly and shut off automatically
  • WIDE APPLICATION: Small shape, 3.3 x 2.2 x 0.8 inch, it is ideal for small aquarium tanks
  • Any problems please don’t hesitate to contact us so that we can provide the best service to you
  • INTELLIGENT AUTOMATIC HEATING: Automatic constant temperature function, intelligent constant temperature controller
  • If your heater is working properly, the red light will be constant on
  • Suitable for freshwater and saltwater aquariums

31. Wuhostam 7W 11 x 5.9 Inch Waterproof Reptile Heating Pad Warmer with Temperature Controller, Power Adjustment Under Tank Terrarium Heater Heat Mat for Pets, Seedling, Small Animals 2 Pack -Pet Supplies

By WUHOSTAM

  • Automatic thermostat, safety and waterproof
  • Power: 110V 7W, Material : PVC, Color : Black.US Standard Plug and voltage,no adapter needed
  • Low wattage heater provide ideal heat for reptile,amphibians and plants
  • Keep reptile tank or vivarium warm without any harm to your pets
  • Heat Mats distributes Heat evenly to the substrate surface.
  • Highly recommend using this product with a thermostat.And please set the temperature probe closest to the heating pad.

32. Hydor 25W Submersible Glass Aquarium Heater – Original Theo -Pet Supplies

By Hydor

  • No damage in case of running dry
  • Shock resistant
  • Graduated scale for precise maintenance of set temperature
  • High resistance – the first shatter proof heater
  • Position vertical, horizontal and completely submerged

33. hygger Mini Betta Fish Heater for Small Fish Bowl 15W Aquarium Heater with LED Display 0-2 Gallon Tank 68°F to 94°F -Pet Supplies

By hygger

  • 15 watt aquarium heater is ideal for small wall fish bowls up to 2 gallon, betta tank, snail tank and turtle tank
  • The nylon integrated fish guard prevents fish from scald and punching
  • The precision temperature control allows you to set the temperature between 68 and 94 degrees F in 2-degree increments
  • Bright, clear LCD display that shows real-time water temperature over guesswork is a big bonous, display in either Celsius or Fahrenheit, depending on your choice
  • [Tiny Flat Heater] Fully-submersible heater by Hygger is easy to install with included suction cups and slim profile, super tiny size just measures 3.5 in x 2 in x 0.8 in, can easily be wedged in a corner, great for small or partially filled tank
  • Build-in thermostat on the cord, this small fish heater can be easily adjusted temperature without getting your hands wet
  • Carbon heating element is more stable and safer than tranditional coil material
  • Red indicator light indicates the heater is working and turns into blue once it reach to desired temperature
  • Betta Heater auto shut off when over-heats temperature over 97 degree Fahrenheit and flashing error code “E2”

34. Aquatop Nano Aquarium Heater, 15-Watt (2.6 To 4 Gallon Aquariums / 77 Degree Fahrenheit Preset Temperature) -Pet Supplies

By AquaTop

  • Shuts Down When Target Temperature is Reached
  • Unbreakable with Reinforced Plastic, Designed for 2.6 to 4 Gallon Nano Aquariums
  • Temperature Controlled Accuracy of Plus or Minus 1.8 Degrees Fahrenheit
  • Precise Electronic Thermostat Pre-Set at 77 Degrees
  • Built-In Suction Cups for Quick Installation

35. Aqueon 100528588 Glass Adjustable Heater,Black , 200W -Pet Supplies

By Aqueon

  • Shatter-resistant
  • Fully submersible, auto shut-off when overheats, resets when cools down
  • Precise temperature setting adjustable to 1° F (68-88° F)
  • For fresh or saltwater aquariums up to 75 gallons
  • Electronic thermostat stops heating once set temperature is reached
  • LED light turns on when aquarium water is being heated, automatic safety shut off and overheat protection

36. NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, 100 Watt, for 10 to 25 Gallon Tank, UL Listed -Pet Supplies

By NICREW

  • Automatic safety shut-off and overheat protection
  • Made from shatter-resistant quartz glass, which helps to keep your fish and other aquarium dwellers safe
  • 100 watt heater is designed for 10 to 25 gallon aquariums
  • Preset to 78°F – no adjustment required, electronic thermostat automatically maintains water temperature
  • LED indicator light displays red when actively heating, off when temperature reached

37. KASANMU Aquarium Heater 50W/100W/200W/500W Submersible QuartzGlass Explosion-Proof Heating Rod with Adjustable Temperature Knob and Temperature Indicator Fish Tank Heater is Suitable Various Fishtank -Pet Supplies

By KASANMU

  • If you have any questions, please contact us directly, we will provide you with a professional solution.
  • After-sales service: Provide you with 12 months of 24/7 customer service
  • Easy to operate: adjust the temperature control is simple, easy to read the temperature indicators on the heating rod, there are two suction cups easy to fix the heating rod and easy to hide in the fish tank.
  • Precise temperature control: The top adopts knob type temperature adjustment, the adjustable temperature is 68°F-93°F, the thermal conductivity is good, the heating speed is fast and accurate, and the error is small.
  • Wide range of applications: 100W submersible heating rods are suitable for 10 to 25 gallons fish tanks, suitable for salt water and freshwater fish tanks.
  • Quality assurance: use thick quartz glass material, explosion-proof anti-corrosion, double-layer waterproof insulation, IP68 high grade waterproof standard.

38. NICREW Temperature Controller, Digital Heating and Cooling Temperature Controller, Reptile Thermostat for Snake, Aquarium, Breeding, Hatching and Heat Mat, 110V, 16A -Pet Supplies

By NICREW

  • All purposes in one machine, ideal used for multiple occasions like aquarium, reptile, greenhouse, brewing and incubation, ect
  • Easy to use LCD display help program quickly, support Fahrenheit and Celsius display, 0.1 degree temperature adjustment
  • Compressor delay available for refrigerator, automatically calculate after the moment refrigeration stops, protect your refrigerator from cycling too fast
  • Plug and play design, choose the heating or cooling mode easily
  • Waterproof and accuracy sensor allow it to work in 20%-85% operating ambient humidity with no condensate situation
  • Maximum output load: 880W(110V)

39. EHEIM Jager Aquarium Thermostat Heater 50W -Pet Supplies

By Eheim

  • Made of shock resistant and shatter proof glass for fresh or marine water
  • Fully submersible
  • Will automatically turn off when water level dips too low
  • TruTemp dial recalibrates the heater for precise temperature regulation
  • On/Off indicator light for at-a-glance monitoring
  • Thermo safey control protects against running dry

40. VIVOSUN Submersible Aquarium Heater 50W Mini Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller -Pet Supplies

By VIVOSUN

  • EXTERNAL TEMPERATURE CONTROLLER: The touch-button controller adjusts the temperature without getting your hands wet
  • MINIATURIZED WITH GREAT EFFECT: With a size of 12.5” (H) x 6.5” (W) this aquarium heater is compact and won’t take up much space and is easy to hide; Whether your tank is 3 gallons or 60 gallons, you’ll find a use for VIVOSUN’s aquarium heater
  • THERMOSTAT HEATING SYSTEM: The VIVOSUN aquarium heater can control water temperature up to your desired temp value and will automatically control the water temp as needed; Your fish, turtles, frogs, or other little pets will spend a warm winter with this aquarium heater
  • LOW WATER LEVEL HEATING: This product is 1.2” thick, which means it can operate in water levels of the same height; It’s perfect for 3 to 5 gallon tanks, but also works with much bigger aquariums; Be sure to match the power to the aquarium dimensions
  • It’s easy to control the temp from 68℉/20°C to 94℉/34°C; Check the size chart to find your desired fish tank heater
  • SAFETY GUARANTEE: Rated IP68, the highest waterproof level, guaranteed that no water will enter nor will power leak; Made of fire-resistant and temperature-resistant plastics; Guaranteed against electrical shortages

Related Posts :

41. Fluval P10 Submersible Aquarium Heater for Up to 3 Gallons, 10 Watts -Pet Supplies

By Fluval

  • LED running lamp illuminates to indicate when product is in use
  • For use in freshwater and saltwater aquariums
  • Preset temperate requires no adjustment
  • Strong shatterproof polymer construction protect tank and inhabitants from damage
  • Waterproof, fully submersible design allows easy positioning inside aquarium

42. PONDFORSE Mini Aquarium Heater 50W Submersible Fish Tank Heater with Digital LED Temperature Display Adjustable External Temperature Controller for Turtle Fish Tank (50W) -Pet Supplies

By PONDFORSE

  • PONDFORSE Aquarium Heater:50 watt submersible fish tank heater, voltage: 110~120V, suitable for use in 2-10 gallon fish and turtles tanks and aquariums
  • The edge of the heater is not sharp and prevents your pet fish from hurt.
  • After your desired temperature is set, the light is on red on the screen
  • The heater is also designed with memories function
  • It is made of high quality quartz-glass, abs plastic material, featuring of quick heating, shatter-resistant and power saving
  • Digital LED Temperature Display:Digital led temperature display shows the real-time temperature and error code on the screen
  • The adjustable temp ranges from 63℉~95℉
  • Once the heater is installed back into the water, it will recover the preset temp and there is no need of resetting.
  • and the accuracy is about±1℉.
  • Run-dry & Memories Function:PONDFORSE fish tank heater adapts updated technology, with run-dry function
  • High-efficient & Durable:Nickel-chromium wire heating tube, heating the water by emitting heat by the nickle-chromium wire, long heat diffusion distance, high speed of heat transfer
  • Once the temperature is beyond the set temperature, it will immediately stop heating, minimizing the security risks.
  • External temperature controller, abandoning the control knob on the top of the heater rob that have to put your hand into the water
  • While the heater is out of water without pulling out the plug, the power of our aquarium heater will be automatically cut off, ensuring secure operation
  • Attention: please ensure the heater is fully submerged into water.
  • Automatic Shut-off:The heater features built-in smart chip

43. Betta Fish Tank Heater, 25W Mini Aquarium Heaters Free 2 Artificial Plants 1 Stick-on Thermometer Strip 2 Suction Cups, Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank -Pet Supplies

By ZEETOON

  • Position it near a strong water flow for whole aquarium are in the same temperature
  • We provide 1 year quality assurance for this product, we will provide replacement items for any product problems within 1 year after your purchase it.
  • Unlike other conventional heaters, need you to manually adjust the temperature
  • ZEETOON Mini Heater provide a constant warm for your pet fish to stay healthy, suitable both for fresh and salt water
  • The outlet of filter is ideal
  • Mini Sized- Fully submersible compact betta fish heater Gift with 2PCS Aquarium Decor Artificial Plant
  • 1 Stick-on Thermometer Strip, Eliminate your worry of not confirming the heating temperature
  • This product have certificated by CE, ROHS, FCC, UL certifications
  • Our Smart Aquarium Heater just plug the power cable then it will work
  • Betta Fish’s Favorite Gifts: ZEETOON Fish Tank Heater Suitable for all kinds of aquarium pets, Betta, tropical fish, goldfish, ornamental fish and turtles, can work in both brine and fresh water
  • When there is a heater in the fish thak, do not put your hand in to the water
  • Your little fishes and turtles will no longer fear the winter! 2 Aquarium Decor Artificial Plants make their homes beautiful not boring
  • Smart Thermostat: ZEETOON Mini Heater different from a manually adjusted heater
  • It works will automatically turn on/off to achieve the setting temperature constantly and stably 73ºF-82ºF(25℃-28℃), Energy-saving life, you will be at your fingertips!
  • Prevent electric shock and burns
  • Our heater automatic temperature regulate on 73ºF-82ºF(25℃-28℃) , no need to set
  • Smart Control: Adopted intelligent circuit board, with a precise sensing probe and thermostat heating system
  • High Quality: Made by heat resistant ABS housing, sandy quartz filler and MCH Alumina ceramic heating system, anti explosion & cracking, it is scald-preventing for your pets and safe operation for you, safer and more stable to use
  • Specific perfect for mini aquarium under 5 gal/20L.for all shapes and materials fish tanks, whether it is glass or plastic, all can be used
  • Keep you and your family safe
  • intelligent temperature regulate, very easy to use.

44. Mylivell Aquarium Heater Submersible Auto Thermostat Heater,Fish Tank Water Heater and Adjustable Temperature with Suction Cup-200W -Pet Supplies

By Mylivell

  • Fully Submersible
  • Convenient and Safe: Our aquarium heater thermostat has two suction cups for attachment to the fish tank
  • Adjustable Temperature: The temperature of the fish tank heater can be adjusted automatically
  • Temperature setting range: 20°~34°C(65° F – 93° F), and the display is easy to read.
  • Power: 200W
  • The polarized plug prevents electrical shock.
  • Both suiting for fresh or saltwater aquariums, provide a constant warm environment for your tropical fish to stay healthy.
  • Suggested water volume: 75gal.
  • High Quality: Aquarium heater made of high quality quartz glass, double seal material , advanced design, ensures safe operation.

45. Hitop 50W 100W 300W Submersible Adjustable Aquarium Heater, for 5 – 70 Gallon Fish Tank (50W for 5-20 Gallon) -Pet Supplies

By HITOP-Fish

  • Application: 50W water heater is suitable for 5 – 20 gallon tank, also suitable for both saltwater and freshwater.
  • Explosion Proof: 2mm thickened explosion proof glass, 33% thicker than the normal, safer for both human and animals.
  • Accurate Temperature: Temperatures from 68°F to 93°F (20°C – 34°C), come with a thermometer sticker, convenient to detect the water temperature without another pay.
  • Complete Accessories and Warranty: Except for thermometer, also equipped with 3 suction cups, one for replacement, and offer 12 months warranty, leave you no worries after you buy it.
  • Long Service Life: Adopt 8-slot multi-branched heating wire ceramic frame, shorter length, 7.8*1*1 in(20*2.5*2.5 cm), better heat dissipation, and can save more space for your fishes.

46. Aqueon 100106252 Preset Heater,Black, 100W -Pet Supplies

By Aqueon

  • Fully submersible, auto shut-off when overheats, resets when cools down
  • Shatter resistant
  • LED light turns on when aquarium water is being heated
  • Ideal for aquariums up to 30 gallons
  • Preset to 78°, accurate to +/- 1°
  • No adjustment required

47. PGFUNNY 50W Aquarium Heater, Adjustable LED Digital Temperature Display Smart Thermostat Betta Fish Heater, for Betta Tank Heater with Protective Guard -Pet Supplies

By PGFUNNY

  • When the water temperature reaches a specified temperature value, the heater will automatically stop heating; When the water temperature is lower than the set temperature, the heater will automatically start heating
  • External temperature setting avoids getting hands wet, digital LED display shows real-time water temperature
  • CE Certification: The aquarium thermometer made of nylon and glass fiber, sandy quartz filler, and MCH Alumina ceramic heating system, anti-explosion & cracking, flame-retardant, keep your fish from scalding
  • The heating temperature ranges from 68°F to 94°F.
  • This product has certificated by CE, ROHS, FCC certifications.
  • When the water level is lower than the water level switch, the heater rod displays E1 and flash.
  • When the temperature is higher than 98℉, the display screen flash, and display E2.
  • This heater automatically shut itself off once it removes from water which ensures the safety of your pet fish
  • Over-temperature protectionHeater for betta fish has an automatic thermostat function
  • Suitable for aquarium pets: Betta Heater Suitable for all kinds of aquarium pets, betta fish, tropical fish, goldfish, ornamental fish, and turtles, can work in both brine and freshwater
  • Water shortage protectionDuring its heating time, the small aquarium heater must be 100% submerged into the water
  • Digital DisplayWith led display on the middle of the heater front side, Long press on fish tank heater switch to switch between Fahrenheit / Celsius display
  • All shapes and materials of betta tank, whether it is glass or plastic, all can be used.
  • when fully in the water again it will return to normal work again

48. MQ Mini Aquarium Heater 25W Betta Fish Tank Heater with Digital LED Display and External Thermostat Controller, for Fish Tank 3-5 Gallon -Pet Supplies

By MQ

  • Intelligent Temperature Control – It can ensure the temperature constant at the set point as it can adjust heating power automatically if there is any water temperature variation
  • It is suitable for fresh or sea water and great for many kinds of aquariums, fishes and amphibious turtles.
  • Easy Viewing and Safe Adjusting – It is easy and safe to adjust temperature by the external controller and the temperature will be shown on the LED screen of the heater.
  • So that it can avoid temperature mutation and protect fishes.
  • Durable Aquarium Heater – This aquarium heater is made of premium thickened Quartz Glass, double seal material, advanced design to ensure safe operation
  • The heater is working when the indicator light is red.
  • It has explosion-proof function while being also shatterproof and waterproof.
  • It will stop heating when the water temp reaches to the set temp, restart heating when the water temp is 4℉ less than the set temp
  • Wide Temperature Range – The temperature of the heater can be adjusted between 20-34℃, 68-94°F

49. Orlushy 50W Mini Submersible Aquarium Heater with External Temp Controller and Built-in Thermometer for Small Fish Tank -Pet Supplies

By Orlushy

  • Otherwise, if the actual temp is below the set temp, the heater will restart to heat up the water
  • Digital & Smart: The heater is equipped with built-in thermometer, when the actual temp is above the set temp, the heater will stop heating
  • Adjustable Temp: To set the desired temperature ranging from 65-93℉by pressing the “set” button, cyclic adjustment, stabilizing the target temperature and small in temp exactness, without worries about what the temperature really is
  • Application: The heater must be fixed fully submersible in water horizontally or vertically, can be applied in glass, plastic tank, fish bowl and square tank
  • And the LED digital display will show the set temp and actual water temp
  • External controller: This heater is designed to be the external controller, and users can change the temperature without having to get your hands wet or without having to take the heater out of the aquarium, providing great convenience
  • 50 Watt Aquarium Heater: For 2-10 gallons fish tank, 50W aquarium heater, voltage 110V, power cord 5(ft), the temp can be set to the values ranging from 65 to 93°F, please choose the right wattage aquarium heater according to our size chart

Best Brands

Buying a product from a reputable manufacturer that provides high brand value is one of the most essential things. Based on my research, here are the top brands that make the best 5 watt aquarium heaters.

  • Cobalt Aquatics
  • Aqueon
  • Tetra
  • AQQA
  • VIBIRIT
  • PULACO
  • DaToo
  • FREESEA
  • SALUTE
  • Hydor

The Buyer’s Guide

Although the aim of this list is to help you choose the best option for your needs. This guide shall help you make an informed purchase decision. Here are the few things to consider when choosing a 5 watt aquarium heaters.

1. Features

There’s no point in purchasing a 5 watt aquarium heaters that doesn’t solve your usage needs. Sometimes, even the best option wouldn’t have all the options you’d need. That’s why list down all your feature requirements and make sure that the option you’ve chosen comes with all of them.

2. Budget

Budget plays an important role, if it wasn’t for the budget, wouldn’t everyone purchase the most expensive option? However, before you decide the budget, I’d recommend you to make a list of features you’d need. In case a feature you need the most isn’t available in your budget range, then there’s no point in buying it, is there?

My advice is to make sure that the product has all the features you need then decide the budget. If a product you’ve chosen isn’t having all the features you need, then you should consider increasing your budget.

3. Value For Money

There are times when you shall come across various 5 watt aquarium heaters that shall have all the features you need. However, the price difference shall exist. In a situation like this, it is recommended to value each feature and make sure that you’re not overpaying for a feature you wouldn’t use.

4. Brand, Customer Support, & Warranty

Purchasing a product from a reputed brand is very important. Not only does it guarantee high-quality build, but you also get much better customer support.

You should also make sure that it has a decent warranty, it is really helpful in case a product breaks down due to manufacturing defects. Also, repairs during warranty are generally free of cost (depends on service terms).

5. Individual Product Reviews

You don’t have to watch individual reviews of each 5 watt aquarium heaters in this list. However, pick 2-3 options that have all the technical aspects according to your usage needs. Once you’re ready with it, go to YouTube/Amazon and look at video/customer reviews to make sure that the existing buyers are satisfied with the product.

The FAQs

Which is the best 5 watt aquarium heaters?

According to my research, the hygger 500W Aquarium Heater for Fresh-Water Salt-Water, with External Digital Display Thermostat Controller and Thermometer, Auto Quartz Submersible Heater for Fish Tank 60-120 Gallon is the best option.

Is hygger a reliable brand?

It’s one of the best brands, not only does it make the top-rated 5 watt aquarium heaters, but it also is known for its exceptional service.

Which is the cheapest yet powerful 5 watt aquarium heaters?

According to me, the NICREW Temperature Controller, Digital Heating and Cooling Temperature Controller, Reptile Thermostat for Snake, Aquarium, Breeding, Hatching and Heat Mat, 110V, 16A is one of the cheapest options available and yet has all the features.

Are there deals going on?

A few of the options in our article are currently available for a discounted price. However, check out the product listing to find more information.

What brands should I consider when purchasing?

Based on my research, these are the top 5 brands: hygger, Cobalt Aquatics, Hydor, Aqueon, and hygger.

Should I buy it online or go to an offline store?

Shopping online comes with a few advantages such as discounted pricing, quick delivery at home. However, if you’re in a hurry or can find the product for a cheaper price in the offline market, consider visiting the offline store.

The Verdict

Choosing the right product isn’t easy and for many of them it could be a time consuming task. However, with this guide, my aim is to help you guys find the perfect 5 watt aquarium heaters for your needs.

I’ve done a huge research to ensure that options I’ve listed are among the best. Like mentioned above, I also interviewed many experts to make sure that the enlisted models are high quality.

I hope that you’re able to find the right 5 watt aquarium heaters for your usage. If you are still struggling to find one, feel free to comment below or contact me.