Editor's Choice - Our Favorite Top Aquarium Heaters

1. FREESEA Aquarium Heater Fish Tank Submersible Heater (50W/75W/100W) with LED Temperature Display

User Ratings: 68 7

FREESEA FS28-50W First Impressions

"Until the next time."

The controller is easy to use, very accurate and reliable. I have only had minor problems with the suction cups. Personally for me the housing doesn't bother me. The setting always stayed the same. My fish likes to get close to it and he has never been hurt by it. The line is there due to regulations in certain countries. Per my thermometers, they are all staying constant.

• FREESEA Aquarium Heater Fish Tank Submersible Heater (50W/75W/100W) with LED Temperature Display
• ★ Temperature range: 59°F~94°F, display Fahrenheit °F, this heater is designed for1~10 gallons tank.
• ★ 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.
• ★ Touch button, cyclic adjust temperature , easy to use and Safety.
• ★【Note】:this heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.
• ★【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. 12 Month Warranty and 24 Hour Professional After-sales Service.
• Manufacture: Guang Zhou City Freesea Industrial Co.,Ltd
• Product Dimensions: 2.5 x 1.5 x 3.5 inches; 8.15 Ounces

• Editor's Impressions Of The FREESEA FS28-50W
• Heat Quality [star rating='4.7']
• Quality [star rating='3.7']
• Value For Money [star rating='3.7']
• Affordability [star rating='3.3']

Peoples Choice - Other Highly Rated Top Aquarium Heaters

2. FREESEA 25/50/100/200/300 Watt Aquarium Heater with Aquarium Submersible Thermometer

User Ratings: 66 8

FREESEA First Impressions

"7L Imagitarium tank."

I use a 50 for a 5 gal and a 10 gal tank. I used to try those other cheap heaters sold on amazon. I will be ordering more of these in the future. Temperature is slightly off by running a little warmer. I adjusted the set temperature a little lower to be more in the range I wanted. Easy enough to let it run all the time. It comes with a hanging kit and can be secured on the edge of the tank.

• FREESEA 25/50/100/200/300 Watt Aquarium Heater with Aquarium Submersible Thermometer
• ★【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.
• ★【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.
• ★【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.
• ★【Note】: 1. 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. 2. Heater rod is suitable for people over 16 years of age. Children or minors should be under adult guidance or supervision.
• ★【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. 12 Month Warranty and 24 Hour Professional After-sales Service.
• Manufacture: FREESEA
• Product Dimensions: 11.3 x 3 x 2 inches; 8.61 Ounces

• Editor's Impressions Of The FREESEA
• Heat Quality [star rating='4.6']
• Quality [star rating='4']
• Value For Money [star rating='3.5']
• Affordability [star rating='3.4']

3. Marineland Precision Heater for Saltwater or Freshwater Aquariums

User Ratings: 64 17

MarineLand ML90652 First Impressions

"There was only~0."

No biggie, but annoying nonetheless. My heater is fully submerged underwater and works perfectly fine. The controller is easy to use, very accurate and reliable. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. Easy enough to let it run all the time. I waited a little bit to write the review so it could be accurate. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees.

• Marineland Precision Heater for Saltwater or Freshwater Aquariums
• This 200 watt heater is for aquariums up to 55 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click.
• Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down.
• The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability
• Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display
• Easy to view sliding scale tells the exact temperature setting. Top dial view shows the setting from an additional location.
• Manufacture: Marineland
• Product Dimensions: 3.94 x 1.63 x 14.81 inches; 10.4 Ounces

• Editor's Impressions Of The MarineLand ML90652
• Heat Quality [star rating='3.9']
• Quality [star rating='4.1']
• Value For Money [star rating='3']
• Affordability [star rating='4.3']

4. 300w 150w 50w Submersible Aquarium Heater Auto Thermostat Heater with Suction,LED Small Mini Tempera...

User Ratings: 59 16

FTSTC First Impressions

"One word of caution."

The temperature gauge is fairly accurate in my 55 gallon tank. 210 gallon ones and one 90 gallon bow front tank. I got the 200W variant for my 54 gallon corner tank that's housing goldfish. I had a thermometer on opposite side of tank and the heater was dead on true. This is a powerful heater that holds temperature very well. Keeps the water consistent and it's easy to adjust! I confirm it with my cooking digital probe thermometer.

• 300w 150w 50w Submersible Aquarium Heater Auto Thermostat Heater with Suction,LED Small Mini Temperature Display Aquarium Fish Tank Heater for Fish Tank Water
• UPGRADED MORE DURABLE VERSION: Provided the best warm area to your fish in the cold winter.Keeps improving best aquarium heater for your fish tank, after collecting so many comments from customers, we upgrade its function and life time, now it works more continuously and accurately.
• MORE SAFETY & HIGH QUALITY: This upgraded aquarium heater now updated for more durable Quartz Glass, which is pretty shatter-proof and blast-proof and prevents electricity leakage. And the stronger protective container updated for Anti-melting anti punching double sealed material, it is scald-preventing for your pets and your safety.
• FREE THERMOMETER: This fish tank heater come with an extra thermometer to show the accurate tank temperature to avoid overheat or freeze. It provide a constant warm environment for your pet fish to stay healthy, suitable both for fresh and salt water.
• TEMPERATURE CONTROL: Aquarium heater works in intermittent operation mode and will automatically turn on/off to achieve the setting temperature constantly and stably. Setting the temperature by the red knob on the top with range is 64°F - 94°F.High accuracy(±1°F)
• APPLICABLE TANK SIZE: Our submersible aquarium heaters are perfect designed for different size tank, 50W for 5-10 gallon; 100W for 10-30 gallon; 300W for 30-85 gallon, please choose the suitable power for your tank. And we also 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.
• Manufacture: FTSTC
• Batteries: 1 LR44 batteries required. (included)

• Editor's Impressions Of The FTSTC
• Heat Quality [star rating='4.5']
• Quality [star rating='4.5']
• Value For Money [star rating='4.8']
• Affordability [star rating='3.3']

Honorable Mentions - More Top Selling Top Aquarium Heaters

5. PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks

User Ratings: 75 7

PULACO PL-168 First Impressions

"5 gallon tank."

I would definitely recommend this product. It just cycles through to 93f and starts over. The setting always stayed the same. The suction cups are large, high quality and seem to stick great. I like to keep it at 72 and from my thermometer it is reading at exactly 72. Keeps the temperature within 1 degree of what you set it to at all times. I am very happy with this purchase.

• PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks
• ★【Betta Heater】This 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.
• ★【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.
• ★【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. Accuracy：±3°F
• ★【Note】: Do not operate or leave product plugged in when it is outside of water, Children should be use this heater under adult's guidance.
• ★【SATISFACTION GUARANTEED】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. 12 Month Warranty and 24 Hour Professional After-sales Service.
• Please install and use this heater under rated voltage conditions(110V-120V/60Hz).
• This heater is designed for small fresh/sea water tanks, please do not use it in chemical water or any other heating purpose, it may damage the heater.
• Children should be use this heater under adult's guidance.
• Manufacture: PULACO
• Product Dimensions: 5.5 x 1.2 x 2.7 inches; 4.48 Ounces

• Editor's Impressions Of The PULACO PL-168
• Heat Quality [star rating='5']
• Quality [star rating='3.7']
• Value For Money [star rating='3.5']
• Affordability [star rating='4.7']

6. HITOP 25W 50W 100W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction ...

User Ratings: 70 5

HITOP HP 608 First Impressions

"Bought the 300W one."

Personally for me the housing doesn't bother me. I used to try those other cheap heaters sold on amazon. Sometimes it gets outside of it's ability to cool but only within a few degrees. There is a misconception on the internet that the heater isn't fully submersible. Easy enough to let it run all the time. I noticed my old hygger heater beginning to fail and my wife ordered this one. This heater warmed it right up and now my Betta and guppies are more active.

• HITOP 25W 50W 100W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cup
• 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.
• Automatic Constant Temperature Function: this fish heater, adjustable temperature 68 ~ 93 °F, will shut off automatically when the temperature is reached, no extra adjustment is required.
• Quick and easy installation, submersible fish tank heater, vertical or horizontal placement using suction cups. 1 extra powerful suction cups as your backup (total 3).
• 50W aquarium heater, length 7.8-inch, power cord 4.9ft, designed for small fish tanks, recommended for aquariums up to 20 Gallons.
• Bonus a stick-on thermometer, no need to buy another thermometer, 24-Hour Professional After-sales Service.
• Manufacture: Haisen
• Product Dimensions: 7.87 x 0.98 x 0.98 inches; 8.78 Ounces

• Editor's Impressions Of The HITOP HP 608
• Heat Quality [star rating='4.6']
• Quality [star rating='4.3']
• Value For Money [star rating='4.7']
• Affordability [star rating='4.8']

7. hygger 50W 100W Submersible Digital Display Mini Aquarium Heater for Small Fish Tank, Compact and Fa...

User Ratings: 67 10

hygger First Impressions

"This heater works great."

The red light means it's off, blue light means the temperature is constant. It does blend well in some setups and may look bulky in others. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. This does a great job at regulating the temp in my 10 gallon. This heater works, but the dial it isn't very accurate. My heater is fully submerged underwater and works perfectly fine. The bonus digital thermometer it came with has been super helpful, and is accurate.

• hygger 50W 100W Submersible Digital Display Mini Aquarium Heater for Small Fish Tank, Compact and Fast Heating Thermostat, with External Controller and Built-in Thermometer, for Betta Turtle
• 【Compact Small Heater】110-120V/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. Heater Dimension: 2.7x1.4x 4.5 inch. The power cord is 5ft, long enough for use indoors. 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
• 【External Controller】easy to set the temp on the controller, only show farenheit temp, you can set the temp range from 63℉ to 94℉, temp accuracy 1℉. 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
• 【Digital Display】with 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. The heater with a built-in thermometer, when temp setting is done, the led will show the water temp all the time. The led will display the set temp digit only when you press the controller
• 【Reliable Thermostat】this 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. 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. 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℉
• 【Shut off When Out of Water】please 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
• Compact and small shape, with plastic guard.
• It has memory function if power failure happens.
• With 2 strong suction cups, can be replaced.
• Manufacture: hygger
• Product Dimensions: 2.76 x 1.38 x 4.53 inches; 9.59 Ounces

• Editor's Impressions Of The hygger
• Heat Quality [star rating='3.7']
• Quality [star rating='3.4']
• Value For Money [star rating='3.3']
• Affordability [star rating='3.2']

8. hygger Submersible Aquarium Heater, Adjustable Fish Tank Heater Compact Reliable Betta Heater, Heat-...

User Ratings: 63 11

hygger First Impressions

"That wasn't a good sign."

We wish the controls were available in Farenheit also to make things a little easier. After several weeks of running the heater. Come on Fluval, expect better from you. It just cycles through to 93f and starts over. I adjusted the set temperature a little lower to be more in the range I wanted. I appreciate the exterior temp readout and control module. Just be careful and keep an eye on your temp settings when you have kids over!

• hygger Submersible Aquarium Heater, Adjustable Fish Tank Heater Compact Reliable Betta Heater, Heat-Resistant Milky Quartz Made, with External Temp Controller, 100W/300W, 10-60 Gallon
• 【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 sump or 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
• 【Temp adjustable】with external temp controller, set the temp to one of these values you can see on the dial: 75, 77, 79, 81, 83, 85, 87, 89, 91 by rotating the pointer, the heater will not work if you set the temp to other degrees between those values. Temp exactness is within 2 degrees in fahrenheit. There is a built-in thermometer in the heater to detect the water 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
• Voltage: 100-120V
• Frequency: 60HZ
• Manufacture: hygger

• Editor's Impressions Of The hygger
• Heat Quality [star rating='3.9']
• Quality [star rating='3.1']
• Value For Money [star rating='4.6']
• Affordability [star rating='3.7']

9. boxtech Aquarium Heater, 50W/100W/300W Explosion Proof Submersible Thermostat with Adjust Knob and 2...

User Ratings: 69 8

boxtech First Impressions

"Best addition to my tank."

There is no protection from it banging on the glass tank. Sometimes you may have to tinker around with the dial. I got this heater for my 55 gallon aquarium. Awesome chiller, perfect for Hydroponics. The heater is easy; turn the dial to set temp and plug in. 210 gallon ones and one 90 gallon bow front tank. I got the 200W variant for my 54 gallon corner tank that's housing goldfish.

• boxtech Aquarium Heater, 50W/100W/300W Explosion Proof Submersible Thermostat with Adjust Knob and 2 Suction Cups Suit Marine Saltwater and Freshwater
• Fish Tank Heater: 300W aquarium heaters suit for 30 - 80 Gallon fish tank. Voltage:110V, power cord is 5.57ft, Max deep water immersion 20 inch/1.7 FT
• Correct installation: Stick the heater vertical onto the tank side near the water intake or on the way of water flow.（This way the heater can quickly sense the water temperature and make adjustments automatically）, Keep the aquarium heater fully submerged in water
• Fully Automatic Control: Design with External Temperature Controller, Temperature Range is 68 ºF-90 ºF, when water temperature achieve the setting temperature, heater will automatically stop heating, when water temperature is lower than the setting temperature, heater will automatically start heating
• Quartz Tube Safety Protection: Made of heat-resistant milky quartz Glass and UL-Approved Power Cord, Controller IPX4, Heater IPX8 that make it pretty shatter-proof and Explosion-proof and prevents electricity leakage, service life can be 3 years or more
• Notice Please: Before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater and regularly clean the scale on the heater
• Temperature Control: Design with External Temperature Controller, Temperature Range is 68ºF-90ºF, when water temperature achieve the setting temperature, heater will automatically stop heating, when water temperature is lower than the setting temperature, heater will automatically start heating.
• Voltage:110 V Frequency: 50HZ
• Led Indicator Light:When it working, the indicator light is red.
• Manufacture: BOXTECH
• Product Dimensions: 13.39 x 1.97 x 3.54 inches; 11.99 Ounces

• Editor's Impressions Of The boxtech
• Heat Quality [star rating='4.9']
• Quality [star rating='4.7']
• Value For Money [star rating='4.6']
• Affordability [star rating='3.4']

10. hygger Saltwater Tank Titanium Tube Submersible Pinpoint Aquarium Heater with Digital Thermostat, IC...

User Ratings: 77 5

hygger First Impressions

"6 gallon tank."

I went ahead and went with the the larger 300W for my 45 gallon. The suction cups are large, high quality and seem to stick great. If the water runs low or air gets in the heater shuts off. Am a totally sold customer and would recommend them to anybody! I got the 200W variant for my 54 gallon corner tank that's housing goldfish. I have it set to 81F to get a 77F water temp. I left seller feedback yesterday but have yet to hear from the seller.

• hygger Saltwater Tank Titanium Tube Submersible Pinpoint Aquarium Heater with Digital Thermostat, IC Temp Controller 50-500 Watt
• [FULLY SUBMERSIBLE]: Our Betta Tank Heater is fully submersible in water HORIZONTALLY with 2 suction cups can be easily mounted on tank. Place it near a strong water flow so that the whole aquarium at the same temperature. Comes with a separate controller where you can easily adjust from low to high without taking out the heater from the aquarium or fish tank.
• [SHATTERPROOF & ANTICORROSION]: Our Titanium Heater is completely shatterproof as there is NO glass in the construction– it’s made from heavy duty, durable Titanium. As it has a great feature of being anticorrosion, it is perfect for freshwater, saltwater aquariums and reef tanks.
• [PINPOINT TEMPERATURE]: Build-in external electronic theromstat, it has DUAL LCD display that clearly shows you the temperature setting in either Celsius or Fahrenheit. Up is aquarium temperature and down is set temperature. Heater will stop heating when temperature rise exactly to your desired temp. Heating temperature range 32 to 104°F. Control accuracy is +/- 0.5° C.
• [AUTOMATED SHUT OFF SYSTEM]: Temperature can be controlled and set to your desired degree of heat. It automatically sets off when it reached the designated temperature of your setting. Voltage: 110V
• [TANK CAPACITY]: 200-watt aquarium heater, 10.7 inches in length. Recommended for aquariums with 20 to 45 gallons of water capacity.
• IP68 100% Waterproof, Fully Submersible
• Titanium Tube, Shatterproof construction, Corrosion Resistant
• Accurate temperature control from 32°F to 104°F
• Manufacture: hygger

• Editor's Impressions Of The hygger
• Heat Quality [star rating='4.3']
• Quality [star rating='3.8']
• Value For Money [star rating='3.8']
• Affordability [star rating='3.8']