10 Best Aquarium Heaters

After analyzing 520 products, scanning 2585 reviews, spending more than 36 hours of research and speaking with our test users, we think the Aqueon Pro Adjustable Heater is the one of the Best Aquarium Heater on the market.

# Image Name Brand Price
1 Aqueon Pro Adjustable Heater Aqueon Pro Adjustable Heater, 200W
(Editor’s Choice)
Aqueon $$$$$ Check price
2 Tetra HT Submersible Aquarium Heater With Electronic Thermostat Tetra HT Submersible Aquarium Heater With Electronic Thermostat
(Best value for the money)
Tetra $$$$$ Check price
3 Aquarium Heater with Extra Thermometer Aquarium Heater with Extra Thermometer,Submersible Fish Tank Water Heater with Adjustable Temperature 300W U-picks $$$$$ Check price
4 Aqueon Submersible Aquarium Heater Aqueon Submersible Aquarium Heater Aqueon $$$$$ Check price
5 EHEIM Jager Aquarium Thermostat Heater 300W EHEIM Jager Aquarium Thermostat Heater 300W Eheim $$$$$ Check price
6 Zacro AH278 Aquarium Heater of 300W with Visible Temperature and Zacro AH278 Aquarium Heater of 300W with Visible Temperature and Floating Thermometer with Suction Cup Zacro $$$$$ Check price
7 Fluval E 300-Watt Electronic Heater Fluval E 300-Watt Electronic Heater Fluval $$$$$ Check price
8 NO.17 Small Submersible Aquarium Heater 150W NO.17 Small Submersible Aquarium Heater 150W, Mini Fish Tank Heaters with Visible Temperature LED Screen and External Temperature Controller for 10-50 Gallon Fish Tank NO.17 $$$$$ Check price
9 Hygger Submersible Fish Tank Heater Hygger Submersible Fish Tank Heater, Compact Reliable Aquarium Heater Adjustable Betta Heater, Heat-Resistant Milky Quartz Made, with External Temp Controller, 50W/100W/300W, 7-60 Gallon (300W) Hygger $$$$$ Check price
10 Mylivell Aquarium Heater 100 W Submersible Fish Tank Water Heater Mylivell Aquarium Heater 100 W Submersible Fish Tank Water Heater Thermostat Mylivell $$$$$ Check price

Aqueon Pro Adjustable Heater – Best Overall Aquarium Heater

Aqueon Pro Adjustable Heater
  • Adjustable heat setting 68 to 88°F, Electronic Thermostat accurate to +/- 1°
  • Shatterproof and nearly indestructible
  • Fully submersible; Auto Shut-Off when over-heats, resets when it cools down
  • LED light is always on: red when heating, green when not heating
  • Limited Lifetime warranty

Tetra HT Submersible Aquarium Heater With Electronic Thermostat – Best Budget Aquarium Heater

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

Aquarium Heater with Extra Thermometer

Aquarium Heater with Extra Thermometer
  • BUY ONE GET ONE FREE: Buy this 300W aquarium heater,get an extra thermometer in free,which to show the accurate tank temperature to avoid overheat or freeze. Our heater provide a constant warm environment for your pet fish to stay healthy, suitable both for fresh and salt water
  • TEMPERATURE CONTROL: It works in intermittent operation mode and will automatically turn on/off to achieve the setting temperature constantly and stably. Setting the temperature by the pink button on the top with range is 68°F - 94°F
  • SAFETY & HIGH QUALITY: The extra thick Quartz Glass is shatter-proof and blast-proof, it prevents electricity leakage. And protective container is made of double sealed material, it is scald-preventing for your pets and safe operation for you
  • TANK CAPACITY: Our aquarium heater is submersible and perfect for 30-75 gallon aquarium. We recommend to position it near a strong water flow, the outlet of a power filter is ideal, so that the whole aquarium are in the same temperature
  • NO ELECTRIC SHOCK: It is designed to work under water only, please NOT turn it on when it's outside water, as dry burning might lead to malfunction. Please don't put it in the water if the wire or glass tube damaged

Aqueon Submersible Aquarium Heater

Aqueon Submersible Aquarium Heater
  • Precise temperature setting to 1-degree F (68-88 degrees F)
  • Recommended for aquariums up to 100- Gallons
  • Shatter-resistant construction, fully submersible
  • LED light turns on when aquarium water is being heated; Automatic safety shut off and overheat protection
  • Lifetime Limited Warranty

EHEIM Jager Aquarium Thermostat Heater 300W

EHEIM Jager Aquarium Thermostat Heater 300W
  • Fully submersible
  • Thermo safey control protects against running dry
  • Will automatically turn off when water level dips too low
  • TruTemp dial recalibrates the heater for precise temperature regulation
  • Made of shock resistant and shatter proof glass for fresh or marine water
  • On/Off indicator light for at-a-glance monitoring

Zacro AH278 Aquarium Heater of 300W with Visible Temperature and

Zacro AH278 Aquarium Heater of 300W with Visible Temperature and
  • Waterproof and Double sealed material--Plastic and black protective container for Scald-preventing and anti punching.
  • Apply to sea water and fresh water .Easy to install and use.
  • Tank capacity: up to 80 Gallons, Voltage/freq: 110-120volt/60hertz.
  • Visible temperature setting, Temperature adjustable of between 65F - 93F.
  • Provided with an thermometer to show the accurate tank temperature to avoid overheat or freeze.

Fluval E 300-Watt Electronic Heater

Fluval E 300-Watt Electronic Heater
  • Dual temperature sensors provide accurate and real time water temperatures
  • LCD temperature display available in both Fahrenheit and Celsius; Range of 68 to 93 degrees Fahrenheit
  • Fast heat technology built with a safety shut-off; Integrated fish guard to protect fish and invertebrates
  • Equipped with a slim profile mounting bracket; Colored display alert system
  • Suitable for aquariums up to 100 gallons;300 watts; 5 year warranty
  • Check out user manual under Product details before using the item.
  • The heater is factory calibrated. Variables such as lower room temperature, wide fluctuations, lack of an aquarium cover, presence of submersible pumps and filters, aquarium placement in proximity to cooling sources, may require a higher wattage for proper control. The volumes indicated are approximate values corresponding to water temperatures up to 26°C/78°F with a room temperature of 20°C/68°F. If the ambient temperature is higher than the set temperature of at least 1°C/2°F, or external sources of heat elevate the aquarium temperature more than 1°C/2°F, the LCD display will remain red until conditions change

NO.17 Small Submersible Aquarium Heater 150W

NO.17 Small Submersible Aquarium Heater 150W
  • 🐟[150W small Aquarium Heater]: This Small Submersible Aquarium Heater is a system that create a warm and comfortable living environment for your lovely fish. 150 watt is perfect for 10-50 gallon large aquariums with heating temperature range 68 to 94°F.
  • 🐟[High Quality Material]: Mini fish tank heaters made of high quality Quartz glass, double seal material and PC, providing explosion-proof, shatterproof, IP68 waterproof, scald-preventing and safe operation for you and your pets.
  • 🐟[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.
  • 🐟[LED Display & Ergonomic Design]: LED digital display, large-screen LED temperature display aquarium fish tank heating rod. Nice and generous. Adjust the set temperature outside.
  • 🐟[WARRANTY]: All products purchased from our company are guaranteed to keep in good repair for 180 days.If quality problems happen in guaranteed period, our company will maintain for free.

Hygger Submersible Fish Tank Heater

Hygger Submersible Fish Tank Heater
  • 【For Fish Tank 30-60 gallon】300W aquarium heater, voltage 110-120V, power cord is 5.4ft, please choose the right wattage aquarium heater according to our size chart. Don't suggest use this heater in a tank with turtles in
  • 【Reliable & Safty Protection】automatically shut off when fault occurs. Effectively maintain the tank water in the constant temp you set, stop heating when the water temp is 1.5-2℉ above the set temp and restart heating when the water temp is 1.5-2℉ below the set temp
  • 【Durable & Compact】this aquarium heater tube is heat-resistant milky quartz 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. A very compact heater, easy to hide in the tank
  • 【Fully Submersible】this fish tank heater is waterproof, must be fully submerged in water when working, stick it horizontally onto the tank side near the water intake or where the way of water flow
  • 【Temp adjustable】with external temp controller, you can set the temp to these values: 75, 77, 79, 81, 83, 85, 87, 89, 91 by rotating the pointer on the dial, temp exactness is within 2 degrees in fahrenheit. The heater will work only when you rotate pointer to the exact temp values on the dial rather than between the values. There is a built-in thermometer in the heater to detect the water temp

Mylivell Aquarium Heater 100 W Submersible Fish Tank Water Heater

Mylivell Aquarium Heater 100 W Submersible Fish Tank Water Heater
  • High Quality: Aquarium heater made of high quality quartz glass, double seal material , advanced design, ensures safe operation.
  • 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.
  • Fully Submersible. Power: 100W. Suggested water volume: 20 gal.
  • Both suiting for fresh or saltwater aquariums, provide a constant warm environment for your tropical fish to stay healthy.
  • Convenient and Safe: Our aquarium heater thermostat has two suction cups for attachment to the fish tank. The polarized plug prevents electrical shock.

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