Editor's Choice - Our Favorite Hydor Aquarium Heaters

1. Hydor Submersible Glass Aquarium Heater - Original Theo

User Ratings: 56 18

Hydor T11702 First Impressions

"Highly recommended."

This has been in my fish tank for a few months now and it's been absolutely perfect! Checked the accuracy of the heater with an infrared thermometer. We would consider a replacement and then we would return the defective unit. So far I like it setup was super easy. I adjusted the set temperature a little lower to be more in the range I wanted. Sometimes it gets outside of it's ability to cool but only within a few degrees. It's only been set up for a month we'll see how well it does in a few months.

  • Hydor Submersible Glass Aquarium Heater - Original Theo
  • High resistance - the first shatter proof heater
  • Shock resistant
  • Position vertical, horizontal and completely submerged
  • Graduated scale for precise maintenance of set temperature
  • No damage in case of running dry
  • Manufacture: Hydor USA, Inc.
  • Product Dimensions: 3.5 x 2 x 10 inches; 8 Ounces
  • Editor's Impressions Of The Hydor T11702
  • Heat Quality [star rating='3.1']
  • Quality [star rating='4.5']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='3.7']

Hydor T11702 Final Thoughts

"I like the size."

Was very impressed with the quality of this heater. It took me only two tries to get it to the correct temperature. Easy enough to let it run all the time. I dont know, and havent tried just yet. Beware, but we are hoping for a good outcome! Also were nice along the whole process. I wouldn't buy any other heater, unless one of these stops working.

Overall Score
3.8

[star rating="3.8"]
(1809 Points)

Peoples Choice - Other Highly Rated Hydor Aquarium Heaters

2. Hydor Slim Heater for Bettas, Bowls and Aquariums

User Ratings: 52 13

Hydor T20201 First Impressions

"And I am glad I did."

I think it works well to not stand out like other heaters. Now, both points are clear on the package instructions. Temperature is slightly off by running a little warmer. My heater is fully submerged underwater and works perfectly fine. It's pretty noticeable, but I don't really care. If the blue light is flashing it means the heater is not fully submersible. I contacted the manufacturer and they sent me a new unit in less than a week!

  • Hydor Slim Heater for Bettas, Bowls and Aquariums
  • Helps guarantee your fish a healthy life by promoting the ideal water temperature.
  • Plug and Play, No temperature to set
  • Can be positioned under gravel
  • No glass components
  • Heater is UL listed
  • Manufacture: Hydor USA, Inc.
  • Product Dimensions: 6.5 x 0.25 x 3.25 inches; 4 Ounces
  • Editor's Impressions Of The Hydor T20201
  • Heat Quality [star rating='3.9']
  • Quality [star rating='4.4']
  • Value For Money [star rating='3.8']
  • Affordability [star rating='3']

Hydor T20201 Final Thoughts

"Overall happy."

The temperatures are pretty accurate. The temperature gauge is fairly accurate in my 55 gallon tank. It took me a few days slowly turning the dial up to finally get it where I wanted. The heater protector was very heavy plastic and slim lined which is great. They promptly fixed the issue without any delays or drama. I adjusted the set temperature a little lower to be more in the range I wanted. Sometimes you may have to tinker around with the dial.

Overall Score
3.9

[star rating="3.9"]
(1510 Points)

3. Aquarium Heater 50W/100W/200W/300W Fish Tank Water Heater Submersible Adjustable Temperature Thermos...

User Ratings: 67 10

Supyouleg First Impressions

"Looks as advertised."

I will be ordering more of these in the future. After several weeks of running the heater. Those turned out to be a hit and miss. Easy enough to let it run all the time. This heater works, but the dial it isn't very accurate. Thanks for the great customer service! I was amazed how quickly I got to my temperature I need it 78 degrees.

  • Aquarium Heater 50W/100W/200W/300W Fish Tank Water Heater Submersible Adjustable Temperature Thermostat for 15 30 55 75 Gallon Freshwater Saltwater Betta Tanks with 2 Suction Cups
  • ✅Upgraded Heater - Our aquarium heater is made of high quality real quartz glass material, will not explode during working, can totally keep your fish safe and health, suit for freshwater and saltwater tank.
  • ✅Circulating Working Mode - Our submersible aquarium heater has a super good feature is after setting your temperature, it will work about 5-10 minutes, then stop 2 minutes, then continue to working, repeat this working mode until get your temperature. This working mode avoid overheating your fish.
  • ✅Adjustable Temperature – The temperature of the water heater can be adjusted, rotate the orange dial can easily set the accurate temperature which you want. Temperature range is 20-34 c(68-93 F).
  • ✅Power – The power of the fish thank heater is 50W, which is suit for 5 to 10 gallons fish tank, low energy consumption. Voltage is 110V-120V. Cable length is 55 inch.
  • ✅Indicator Light - This small aquarium heater thermostat has a indicator light to let you know when the heater is on. It will be red when heating and off when the proper temperature has been reached. It will stop work automatic when water reach the temperature which you set, and begin to work when water temperature bellow setting temperature.
  • 4: Must be full submersible into water, don’t leave half heater out of water.
  • Manufacture: Supyouleg
  • Editor's Impressions Of The Supyouleg
  • Heat Quality [star rating='4.6']
  • Quality [star rating='3.2']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.9']

Supyouleg Final Thoughts

"So far so good."

The heater is easy; turn the dial to set temp and plug in. My heater is fully submerged underwater and works perfectly fine. It does blend well in some setups and may look bulky in others. The suction cups are large, high quality and seem to stick great. Well worth the money the first one I bought still works great. Bought it as a chiller for the k40 CO2 laser. Keeps the water consistent and it's easy to adjust!

Overall Score
4.2

[star rating="4.2"]
(156 Points)

4. Inkbird Temperature Controller ITC308 Reptile Freezer Thermostat Aquarium Heater Cooler 110V 1100W P...

User Ratings: 71 9

Inkbird 8541956716 First Impressions

"16-26 gallons 75 watt 10."

Keeps the temperature within 1 degree of what you set it to at all times. It's pretty noticeable, but I don't really care. I bought a similar one at the pet store and it barely worked. This is a great heater that is very easy to set up and program. And kids love pushing all sorts of buttons. 210 gallon ones and one 90 gallon bow front tank. Checked the accuracy of the heater with an infrared thermometer.

  • Inkbird Temperature Controller ITC308 Reptile Freezer Thermostat Aquarium Heater Cooler 110V 1100W Pre Wired Dual Stage Digital Outlet Probe Heating Cooling Plug Homebrewing Refrigerator Greenhouse
  • Pre-wired controller ITC-308 is served as the successor to the STC-1000. If you don't want to build your own STC-1000, the Inkbird ITC-308 is the solution!
  • Setup is easy, straightforward and quick.
  • The cord on the remote temperature sensor is a bit over 6 feet long.
  • Accurate displays, thermostatic function and temperature calibration.
  • It's an all in one, simple solution providing control of cooling and heating.
  • Item Weight: 14.4 ounces
  • Editor's Impressions Of The Inkbird 8541956716
  • Heat Quality [star rating='3.5']
  • Quality [star rating='5']
  • Value For Money [star rating='4.3']
  • Affordability [star rating='4.6']

Inkbird 8541956716 Final Thoughts

"Pricing was good."

This has the best controller that I have found on the market. The temperature lights up so it's very easy to read. I have a 10gallon tank that was at 72 degrees. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. Checked the accuracy of the heater with an infrared thermometer. Now, both points are clear on the package instructions. This little heater is perfect; this is our third purchase of the same heater.

Overall Score
4.3

[star rating="4.3"]
(132 Points)

5. ViaAqua 300-Watt Quartz Glass Submersible Heater with Built-In Thermostat

User Ratings: 73 5

ViaAqua VA 300Q First Impressions

"Highly recommended."

The temperature lights up so it's very easy to read. The heater is super thin and the reflective surface is interesting. Was very impressed with the quality of this heater. The line is there due to regulations in certain countries. They shipped us the upgraded version that also heats! I use this little heater for my 10 gallon quarantine tank. I used to try those other cheap heaters sold on amazon.

  • ViaAqua 300-Watt Quartz Glass Submersible Heater with Built-In Thermostat
  • High quality quartz glass
  • Fully-submerisble
  • Visible temperature setting
  • For use in fresh or saltwater aquariums
  • Manufacture: Commodity Axis
  • Product Dimensions: 1.13 x 1.13 x 14.8 inches; 10.88 Ounces
  • Editor's Impressions Of The ViaAqua VA 300Q
  • Heat Quality [star rating='4']
  • Quality [star rating='3.8']
  • Value For Money [star rating='3.6']
  • Affordability [star rating='3.9']

ViaAqua VA 300Q Final Thoughts

"Great concept."

It took about an hour to reach 80f, which is fairly quick. Those turned out to be a hit and miss. If the blue light is flashing it means the heater is not fully submersible. I got the 200W variant for my 54 gallon corner tank that's housing goldfish. I have only had minor problems with the suction cups. I have a 10gallon tank that was at 72 degrees. I think it works well to not stand out like other heaters.

Overall Score
4.5

[star rating="4.5"]
(1104 Points)

6. Inkbird Pre-Wired Digital Dual Stage Temperature Controller Outlet Thermostats 110V 1100W With 6.65f...

User Ratings: 64 10

Inkbird First Impressions

"I do recommend."

This heater warmed it right up and now my Betta and guppies are more active. But my guys don't read them and don't listen! I was amazed how quickly I got to my temperature I need it 78 degrees. Personally for me the housing doesn't bother me. I love the heater otherwise, but I'm afraid some water has gotten inside the heater. The temperatures are pretty accurate. I'm in the process of setting up for tanks.

  • Inkbird Pre-Wired Digital Dual Stage Temperature Controller Outlet Thermostats 110V 1100W With 6.65ft DC Cord NTC Stainless Probe Sensor for Aquarium, Incubator ect
  • The sensor can easily be replaced.
  • Maximum output load: 1100W (120V).
  • Supports Centigrade or Fahrenheit unit display.
  • Alarm when over-temperature and sensor error.
  • Dual display window, be able to display measured temperature and set temperature at the same time.
  • Item Weight: 1.06 pounds
  • Editor's Impressions Of The Inkbird
  • Heat Quality [star rating='4.6']
  • Quality [star rating='4.8']
  • Value For Money [star rating='5']
  • Affordability [star rating='3.7']

Inkbird Final Thoughts

"I like this heater."

I am very happy with this purchase. It's pretty noticeable, but I don't really care. I'm not a big fan of the big glass tubes. Thanks for the great customer service! Once I opened the box i noticed the quality of the construction. The temperature gauge is fairly accurate in my 55 gallon tank. This has the best controller that I have found on the market.

Overall Score
4.1

[star rating="4.1"]
(25 Points)

7. Periha 300W Aquarium Heater Fast Heating Submersible Fish Tank Heater with 2 Suctions Black Safe Pro...

User Ratings: 67 6

Periha First Impressions

"Temperature!"

The bonus digital thermometer it came with has been super helpful, and is accurate. This has been in my fish tank for a few months now and it's been absolutely perfect! Bought it as a chiller for the k40 CO2 laser. There is no protection from it banging on the glass tank. This product came in the nick of time! Also were nice along the whole process. I have 3 of the Fluval heaters, in various sizes.

  • Periha 300W Aquarium Heater Fast Heating Submersible Fish Tank Heater with 2 Suctions Black Safe Protective Case Adjustable Temperature Knob Suitable for 52 to 80 Gallons Aquariums
  • SAFE & RELIABLE: This Heater adopts an explosion-proof quartz tube, not afraid of occasional quench and heat. Double waterproof design, high-quality waterproof material, waterproof grade IPX8. Preventing your pet fish be electrocuted or burned due to leakage of the product. Keep your fish safe and warm.
  • ACCURATE TEMP CONTROL: Use the inner temperature controller on the top to set and adjust the desired temperature 20°C-34°C(68℉-93.2 ℉). Temperature error within ± 1 ℃. You can choose the coziest temperature for your fish.
  • FIT 80 GALLON TANKS: 300W power output, this heater is suitable for max 80 gallons aquariums and tanks, and it can be used in freshwater and saltwater. The temperature in the aquarium will rise to the ideal state soon.
  • FULLY SUBMERSIBLE: The heater must fully submersible in the water with 2 suckers. When heated for the first time, pls wait for 10-15 minutes to let the internal temperature adapt to the actual water temperature in the tank, then connect to the power supply.
  • SATISFACTORY WARRANTY: We offer 30 days full refund and 1-year limited warranty, any questions pls contact us first, we will respond within 24 hours!
  • Manufacture: qingfengdianqi
  • Product Dimensions: 1.2 x 1.2 x 15 inches; 13.62 Ounces
  • Editor's Impressions Of The Periha
  • Heat Quality [star rating='5']
  • Quality [star rating='4.2']
  • Value For Money [star rating='3.7']
  • Affordability [star rating='4.8']

Periha Final Thoughts

"Works just as advertised!"

And I get to keep the first one I bought! I use a 50 for a 5 gal and a 10 gal tank. It's pretty noticeable, but I don't really care. And I get to keep the first one I bought! You don't have to worry about wide temperature swings with this unit. But I am single and don't have to worry about this. Well I bought a second one took me only one trying to get the right temperature.

Overall Score
4.3

[star rating="4.3"]
(40 Points)

8. PULACO 25W Mini Aquarium Heater, Betta Fish Tank Heater for 1-5 Gallon Small Fish Tanks

User Ratings: 58 14

PULACO PL-168 First Impressions

"Overall happy."

It's pretty noticeable, but I don't really care. Two inches above that is a waterline for maximum. The temperatures are pretty accurate. No biggie, but annoying nonetheless. It's pretty noticeable, but I don't really care. I noticed my old hygger heater beginning to fail and my wife ordered this one. I have only had minor problems with the suction cups.

  • PULACO 25W Mini Aquarium Heater, Betta Fish Tank Heater for 1-5 Gallon Small Fish Tanks
  • ★【Quartz glass heater】: The heating device is made of heat-resistant quartz glass, explosion-proof and strong thermal conductivity. It can be used for 1-5 gallon glass or acrylic fish tanks.
  • ★【Easy to operate】: This heater is different from traditional heaters. 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】: The heater needs to be fully submerged, the external controller is not waterproof, and children need to be used under the supervision or guidance of adults.
  • ★【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.
  • Plug in, the controller LED lights on, press the button and switch it continuously until the LED display shows your expecting temperature (From 68~93℉ ), and wait 3 seconds for system confirmation, then heater will start heating up to your preset temperature.
  • Red lights means the heater is on heating mode, when heater heating up to the preset temperature, blue lights on, and heater will stop heating (Restart heating when temperature less than preset temperature)
  • Operation for example: Plug in and LED display shows preset temperature 68℉, you want adjust it to 78℉, then press the button 10 times continuously, LED display will shows 78℉, and wait 3 seconds flashing, then setting fishined, heater will start heating from 68℉ to 78℉.
  • Manufacture: PULACO
  • Product Dimensions: 3.34 x 1.77 x 6.7 inches; 4.32 Ounces
  • Editor's Impressions Of The PULACO PL-168
  • Heat Quality [star rating='4.2']
  • Quality [star rating='3.1']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='3.2']

PULACO PL-168 Final Thoughts

"What a long."

It just cycles through to 93f and starts over. Bought it as a chiller for the k40 CO2 laser. I had a thermometer on opposite side of tank and the heater was dead on true. This has the best controller that I have found on the market. The cover over the heating tubes is great, the turtles claws can't damage the tube. It does blend well in some setups and may look bulky in others. After several weeks of running the heater.

Overall Score
4.0

[star rating="4"]
(38 Points)

9. 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']

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

[star rating="4.3"]
(2933 Points)

10. FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermos...

User Ratings: 69 4

FEDOUR First Impressions

"Great heater."

The temperature lights up so it's very easy to read. I love the heater otherwise, but I'm afraid some water has gotten inside the heater. At this time I highly recommend this product. I tested it by unplugging and replugging it. Am a totally sold customer and would recommend them to anybody! Once attached to the tank wall I've had no issues with it coming off. If the blue light is flashing it means the heater is not fully submersible.

  • FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermostat for 5-40Gallon Fish and Turtle Tank
  • More Power and Longer Life: This heater is for 15-40 gallon fish tank, comparing to 100W, this 120W aquarium heater is more powerful and heating the same water in shorten time. Less working time provide longer life.
  • Double Safety Protection: 2mm thickened explosion-proof glass, 33% thicker than normal 1.5mm aquarium heaters, adding a specialized protective cover wrapping the heater tube, more durable and much safer for both human and aquatic creature.
  • Application: 120W suitable for15-40gallon fish tank, suitable for both fresh and marine water, suitable for all kinds of fish, turtle and plants. Size: 24cm in Length.
  • High-precision temperature control system, adjustable temperature ranges from 20°C - 34°C (68°F to 93°F).
  • Complete accessories: An additional stick-on thermometer as a bonus to detect water temp at any time, and an extra suction cup providing for spare. Offering 12 months warranty for the whole heater.
  • Install the suction cups on the heater according to the installation diagram.
  • Please pay more attention to the change of the water temperature during the first week.
  • Manufacture: IBAY
  • Editor's Impressions Of The FEDOUR
  • Heat Quality [star rating='4.9']
  • Quality [star rating='3.4']
  • Value For Money [star rating='3.4']
  • Affordability [star rating='4.4']

FEDOUR Final Thoughts

"The accuracy is perfect."

The heater is super thin and the reflective surface is interesting. Once attached to the tank wall I've had no issues with it coming off. It took me a few days slowly turning the dial up to finally get it where I wanted. I went ahead and went with the the larger 300W for my 45 gallon. The line is there due to regulations in certain countries. I confirm it with my cooking digital probe thermometer. I'm in the process of setting up for tanks.

Overall Score
4.4

[star rating="4.4"]
(113 Points)

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