Editor's Choice - Our Favorite FREESEA 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
  • Quality
  • Value For Money
  • Affordability

FREESEA FS28-50W Final Thoughts

"So far so good."

My heater is fully submerged underwater and works perfectly fine. Maintains it well except when the weather is already warm then it over heats it. I use this little heater for my 10 gallon quarantine tank. Seems to keep the temp n the tank fairly regular. You program it for temperature you want your tank to be. The cover over the heating tubes is great, the turtles claws can't damage the tube. You program it for temperature you want your tank to be.

Overall Score
4.3


(2933 Points)

Peoples Choice - Other Highly Rated FREESEA 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
  • Quality
  • Value For Money
  • Affordability

FREESEA Final Thoughts

"Highly recommended."

So when I first received it it didn't work and I was very disappointed. The temperature gauge is fairly accurate in my 55 gallon tank. I will definitely be buying another one for my other tanks at bigger one. I have it set to 81F to get a 77F water temp. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. The heater is being used in a 40 gallon breeder. The bonus digital thermometer it came with has been super helpful, and is accurate.

Overall Score
4.3


(2536 Points)

3. FREESEA Aquarium Fish Tank Heater: 50 | 100 | 300 Watt Adjustable Thermostat with 2 Suction Cups & T...

User Ratings: 70 10

FREESEA First Impressions

"Quality was amazing."

Thanks for the great customer service! This little heater is perfect; this is our third purchase of the same heater. Bought it as a chiller for the k40 CO2 laser. Will update my review if any changes occur. The line is there due to regulations in certain countries. This product came in the nick of time! It took me only two tries to get it to the correct temperature.

  • FREESEA Aquarium Fish Tank Heater: 50 | 100 | 300 Watt Adjustable Thermostat with 2 Suction Cups & Thermometer for Betta Tank | Saltwater Tank | Aquarium | Coral Tank
  • ★【300Watt Heater】: This Aquarium heater is suitable for 40 to 60 gallons aquariums, Length - 12.6 inch,voltage 110-120V, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.
  • ★【Temperature Range】: 64°F~93°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.
  • ★【High Quality】: This upgraded aquarium heater now updated for 2mm 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, suitable both for fresh and salt 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: FREESEA
  • Product Dimensions: 13.39 x 1.18 x 0.79 inches; 10.58 Ounces
  • Editor's Impressions Of The FREESEA
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

FREESEA Final Thoughts

"Well written but vague."

The heater protector was very heavy plastic and slim lined which is great. It would stick out of my 30 g wide tank if I were to put it vertical. It took me only two tries to get it to the correct temperature. This heater works, but the dial it isn't very accurate. The bonus digital thermometer it came with has been super helpful, and is accurate. Product was received fast, works excellent! It is safe and dependable and comes with a one year warranty.

Overall Score
4.3


(44 Points)

4. NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, UL Listed

User Ratings: 71 6

NICREW N11941 First Impressions

"Overall happy."

I will definitely be buying another one for my other tanks at bigger one. Just be careful and keep an eye on your temp settings when you have kids over! This heater is NOT fully submersible. The controller is easy to use, very accurate and reliable. I wouldn't buy any other heater, unless one of these stops working. The suction cups are large, high quality and seem to stick great. The temperature gauge is fairly accurate in my 55 gallon tank.

  • NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, UL Listed
  • Preset to 78°F - no adjustment required, which is the ideal temperature for most tropical fish
  • Automatic safety shut-off to avoid overheating
  • Indicator light allows simple visual confirmation of heater operation (red: heating up; off: temperature reached or unplugged)
  • Made from heat, shatter resistant quartz glass to allows for safe temperature control
  • Suitable for 3 - 10 gallon freshwater, marine and tropical aquariums
  • Manufacture: NICREW
  • Editor's Impressions Of The NICREW N11941
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

NICREW N11941 Final Thoughts

"9 degrees."

The temperatures are pretty accurate. Awesome chiller, perfect for Hydroponics. The heater is being used in a 40 gallon breeder. What more could you ask for great job Hygger Duncan. They shipped us the upgraded version that also heats! Come on Fluval, expect better from you. I like to keep it at 72 and from my thermometer it is reading at exactly 72.

Overall Score
4.4


(647 Points)

5. TOOSELL 500W Aquarium Heater with Intelligent LED Temperature Display and External Temperature Cont...

TOOSELL First Impressions

"Well written but vague."

This is only day one though, so I shall keep an eye one it. What more could you ask for great job Hygger Duncan. I have a 10gallon tank that was at 72 degrees. It just cycles through to 93f and starts over. I got this heater for my 55 gallon aquarium. The heater is super thin and the reflective surface is interesting. I got a hold of Amazon, who put me in touch with the seller.

  • TOOSELL 500W Aquarium Heater with Intelligent LED Temperature Display and External Temperature Controller, Fish Tank Heaters Auto Thermostat for Fresh Water, Marine Water, Aquaculture
  • PREMIUM MATERIALS:The aquarium heater made of durable titanium alloy tube is suitable for fresh water, salt water and other waters, durable and long service life.
  • SAFE TO USE & EASY TO OPERATE: First, after installing the aquarium heater and thermometer correctly, just set the required heating temperature, and the blue indicator light can ensure that the temperature is constant at the set point, because if there is water temperature, it Can automatically adjust the heating power variation, and ON/OFF switch and adjustable temperature controller.
  • EXQUISITE AND SMALL, DOES NOT TAKE UP SPACE: small size, easy to hide in the water tank, and with 2 suction cups, can stabilize the heater in the position of the water tank, and is suitable for 250-350L fish tanks.
  • The dual sensing probes on the top of the heater can provide more precise sensing. Through temperature control, there are indicators on the LED display to show the heating status. Long press the "Settings" key to switch between degrees Celsius and Fahrenheit. In addition, using a constant temperature controller, the temperature can be set from 68°F to 94°F, adjusted to a temperature suitable for fish, and the anti-scalding heater cover can prevent the fish from getting too close to the heater.
  • SATISFACTION GUARANTEE: If you are not satisfied with this order, please contact us via email. We will reply to you within 24h and offer you the best customer service.
  • Manufacture: Toosell
  • Editor's Impressions Of The TOOSELL
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

TOOSELL Final Thoughts

"Great product!"

Very easy to install and the adjustable temperature gauge is pretty accurate. This is a powerful heater that holds temperature very well. We wish the controls were available in Farenheit also to make things a little easier. They shipped us the upgraded version that also heats! Personally for me the housing doesn't bother me. I wouldn't buy any other heater, unless one of these stops working. Also were nice along the whole process.

Overall Score
4.0


(1 Points)

6. Aqueon Pro Adjustable Heater, 100W

User Ratings: 69 11

Aqueon 100106106 First Impressions

"I have a 5."

You don't have to worry about wide temperature swings with this unit. I have it set to 81F to get a 77F water temp. The heater protector was very heavy plastic and slim lined which is great. Also were nice along the whole process. The temperature has been holding all day, even in a colder room. Well I bought a second one took me only one trying to get the right temperature. I contacted the manufacturer and they sent me a new unit in less than a week!

  • Aqueon Pro Adjustable Heater, 100W
  • 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
  • Manufacture: Aqueon
  • Item Weight: 9.6 ounces
  • Product Dimensions: 4 x 14 x 2 inches
  • Editor's Impressions Of The Aqueon 100106106
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Aqueon 100106106 Final Thoughts

"Well written but vague."

We would consider a replacement and then we would return the defective unit. Once attached to the tank wall I've had no issues with it coming off. This this is amazing and is worth the money. Also were nice along the whole process. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. The heater is super thin and the reflective surface is interesting. So if you set it to 78 degrees, the heater will not kick on until it reads 76.

Overall Score
4.2


(793 Points)

7. DECJ Submersible Aquarium Heater, 25W/50W/100W/150W/200W/ Fish Tahk Heater, with Adjust Knob Thermos...

DECJ First Impressions

"Very quick shipping."

If the blue light is flashing it means the heater is not fully submersible. I bought a similar one at the pet store and it barely worked. This has the best controller that I have found on the market. They shipped us the upgraded version that also heats! I tested it by unplugging and replugging it. This is only day one though, so I shall keep an eye one it. The bonus digital thermometer it came with has been super helpful, and is accurate.

  • DECJ Submersible Aquarium Heater, 25W/50W/100W/150W/200W/ Fish Tahk Heater, with Adjust Knob Thermostat 2 Suction Cups and Free Thermometer, Suitable for Marine Saltwater and Freshwater,150watt
  • IP68 WATERPROOF: This fish tank heater is waterproof, must be fully submerged in water when working, stick it with suctions horizontally or vertically onto the tank side near the water intake or where the way of water flow. Please unplug the power supply when cleaning the fish tank or aquarium water changes.
  • LED DISPLAY: Electronic Thermostat accurate to +/- 1 ℃, no need to buy another thermometer, Clearly show the temperature you set, the red indicator light is on when it start to heat your tank, and the blue indicator is on when tank reaches the temperature you regulates.
  • OVER-HEATED & SAFTY PROTECTION: When water temperature reaches to set temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. When lack of water, the heater will stop working to prevent dry burning.
  • TEMP ADJUSTABLE(℃/℉ Switchable): The temperature adjustable range is from 68℉ to 94℉ (20℃-34℃), which is suitable for different aquariums,hydroponics growing system,various ornamental fish and amphibious turtles. Essential for arowana, aquarium fish, fish ponds, and turtles.
  • UNIQUE WATER CHANGER: The water filter has a built-in porous filter to prevent fish or water grass and sand from being sucked out; the water control valve can adjust the water flow size, which is conducive to cleaning relatively small sand and gravel.
  • Manufacture: Aquarium Heaters & Chillers
  • Editor's Impressions Of The DECJ
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

DECJ Final Thoughts

"Love this heater!"

My marina heater takes a few hours. They shipped us the upgraded version that also heats! And I get to keep the first one I bought! Takes a little while to drop the temps if it is hot in the garage. The heater is super thin and the reflective surface is interesting. I am very happy with this purchase. I like the fact that it comes with a digital thermometer.

Overall Score
5.0


(1 Points)

8. SALUTE Aquarium Heater Submersible Auto Thermostat Heater, (50W/100W/200W/300W) Fish Tank Heater and...

User Ratings: 72 4

SALUTE First Impressions

"Very pleased so far."

This product came in the nick of time! I left seller feedback yesterday but have yet to hear from the seller. We received the chiller promptly and put it into use. Also were nice along the whole process. They shipped us the upgraded version that also heats! The line is there due to regulations in certain countries. Sometimes it gets outside of it's ability to cool but only within a few degrees.

  • 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
  • Accurate Temperature Control: Power: 300W. Suggested water volume: 75-115gal. The aquarium heater temperature can be adjusted automatically. It is very easy to adjust the temperature you need, Adjustable heater from 68°F to 93°F (20°C - 34°C). A good temperature range for most fishes is 76°F to 80°F (25- 27°C).
  • Suction Cup Fixing: Fish tank heater also equipped with 2 suction cups . The aquarium heater can be fixed at any position on the cylinder wall. The product's suction cups use thicker, non-aging materials, which greatly extend the life.
  • Safe to Use: Double waterproof protection, complete underwater design can accurately maintain the temperature. Aquarium heater with two individual suction units available for safety. Polarity prevention and the power conversion is safe and reliable. Easy operation and high temperature resistance, explosion-proof quartz glass tube, high safety!
  • High Quality: Excellent heat resistance, good thermostat Heater insulation, high heat transfer efficiency, strong support hooks and suction cups, the product is more stable and reliable.
  • 100% Money Back Guarantee: We are so confident you'll think we have the best submersible heater on the market. If you have any problems with aquarium heater, please feel free to contact us by email. We will offer a free replacement or full refund.
  • Manufacture: SALUTE
  • Editor's Impressions Of The SALUTE
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

SALUTE Final Thoughts

"So far so good."

This is a great heater that is very easy to set up and program. If the water runs low or air gets in the heater shuts off. This heater warmed it right up and now my Betta and guppies are more active. I dont know, and havent tried just yet. I'm not a big fan of the big glass tubes. And I get to keep the first one I bought! I got this heater for my 55 gallon aquarium.

Overall Score
4.5


(347 Points)

9. WiFi Enabled Aquarium Monitor and Controller. Text and Email Alerts for Fish Tank Temperature, Level...

LEVEL SENSE First Impressions

"Best value."

The bonus digital thermometer it came with has been super helpful, and is accurate. Ick for instance detaches from fish at 86 degrees and dies at 89. Well worth the money the first one I bought still works great. This has been in my fish tank for a few months now and it's been absolutely perfect! This heater works, but the dial it isn't very accurate. I like the fact that it comes with a digital thermometer. The temperatures are pretty accurate.

  • WiFi Enabled Aquarium Monitor and Controller. Text and Email Alerts for Fish Tank Temperature, Level Control & Leaks
  • Wi-Fi Enabled Leak Detection, Temperature and Level Alerts. Monitor aquarium from anywhere in the world!
  • Can directly control either the aquarium heater, aquarium lights, or Automatic Top Off (ATO) Pump
  • Provides Text and Email Alerts to Unlimited Recipients
  • Monitor aquarium temperature, water level, household temperature and humidity online.
  • Built in Auto Recharging Battery provides Tripped Breaker and Power Loss Detection
  • Approved for Fresh or Saltwater Use
  • Water Leak Detection
  • Power Failure Notifications
  • Manufacture: Sump Alarm Inc.
  • Batteries: 1 Lithium Polymer batteries required. (included)
  • Editor's Impressions Of The LEVEL SENSE
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

LEVEL SENSE Final Thoughts

"Works just as advertised!"

For Discus you need warm and accurate heater and this seems to do the trick. This heater works, but the dial it isn't very accurate. Also were nice along the whole process. There is no protection from it banging on the glass tank. Two inches above that is a waterline for maximum. I wouldn't buy any other heater, unless one of these stops working. Am a totally sold customer and would recommend them to anybody!

Overall Score
5.0


(2 Points)

10. Aqua Euro USA Apex 1/4th HP Aquarium Chiller, 660 GAL

Aqua Euro USA First Impressions

"Pricing was good."

This is a powerful heater that holds temperature very well. I wouldn't buy any other heater, unless one of these stops working. After several weeks of running the heater. The line is there due to regulations in certain countries. Was very impressed with the quality of this heater. Also I like how it shows both the current temperature and the set temperature. I used to try those other cheap heaters sold on amazon.

  • Aqua Euro USA Apex 1/4th HP Aquarium Chiller, 660 GAL
  • Titanium heat exchanger features a high BTU rating for superior heat removal
  • Aquarium water chiller designed with quiet operation-rubber mounts to reduce vibration
  • Powerful compressor uses Freon-free and ozone-friendly R134a refrigerant
  • 1/4 Horsepower rating
  • Manufacture: Aqua Euro USA
  • Item Weight: 49.9 pounds
  • Product Dimensions: 17.1 x 11.6 x 18.5 inches
  • Editor's Impressions Of The Aqua Euro USA
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Aqua Euro USA Final Thoughts

"This is a quality heater."

Also I like how it shows both the current temperature and the set temperature. I have 3 of the Fluval heaters, in various sizes. If the water runs low or air gets in the heater shuts off. I like how the heater is constructed. Very easy to install and the adjustable temperature gauge is pretty accurate. Will update my review if any changes occur. I'm not a big fan of the big glass tubes.

Overall Score
5.0


(2 Points)

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