Editor's Choice - Our Favorite Marina Aquarium Heaters

1. Fluval Marina Submersible Heater for Aquarium, Mini

User Ratings: 59 9

Marina 11230 First Impressions

"Best value."

We wish the controls were available in Farenheit also to make things a little easier. It would stick out of my 30 g wide tank if I were to put it vertical. There is a misconception on the internet that the heater isn't fully submersible. No biggie, but annoying nonetheless. I would definitely recommend this product. Sometimes it gets outside of it's ability to cool but only within a few degrees. It's pretty noticeable, but I don't really care.

  • Fluval Marina Submersible Heater for Aquarium, Mini
  • 25-Watt submersible heater for freshwater or saltwater aquariums
  • Easy to read temperature settings
  • Impact-resistant glass design; waterproof sealing
  • Includes bracket with suction cups for easy, secure installation
  • Bumper guard to protect fish
  • Length: 15 cm (6”)
  • Impact-resistant glass design
  • Water proof sealing
  • Manufacture: Marina
  • Product Dimensions: 1.3 x 5 x 10.5 inches; 6.4 Ounces
  • Editor's Impressions Of The Marina 11230
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Marina 11230 Final Thoughts

"Amazing customer service."

The red light means it's off, blue light means the temperature is constant. We wish the controls were available in Farenheit also to make things a little easier. The temperature gauge is fairly accurate in my 55 gallon tank. I am very happy with this purchase. We wish the controls were available in Farenheit also to make things a little easier. --The cylinder or rod diameter is bigger. This is a great heater that is very easy to set up and program.

Overall Score
4.1


(956 Points)

Peoples Choice - Other Highly Rated Marina Aquarium Heaters

2. Fluval Marina Submersible Heater for Aquarium

User Ratings: 68 7

Marina 11233 First Impressions

"The accuracy is perfect."

This product came in the nick of time! I got this heater for my 55 gallon aquarium. They promptly fixed the issue without any delays or drama. When i installed them, i let them sit in the tanks without power for 6-24 hours. I adjusted the set temperature a little lower to be more in the range I wanted. Those turned out to be a hit and miss. I think it works well to not stand out like other heaters.

  • Fluval Marina Submersible Heater for Aquarium
  • Submersible heater for fresh or saltwater aquariums or reservoirs
  • Easy to read temperature settings
  • Impact-resistant glass design; Water proof sealing
  • Includes bracket with suction cups for easy, secure installation
  • Length: 8.5 Inch
  • Manufacture: Marina
  • Product Dimensions: 1.5 x 1.5 x 8.5 inches; 9.6 Ounces
  • Editor's Impressions Of The Marina 11233
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Marina 11233 Final Thoughts

"I like it."

The temperatures are pretty accurate. Product was received fast, works excellent! The temperature lights up so it's very easy to read. The temperature gauge is fairly accurate in my 55 gallon tank. The bonus digital thermometer it came with has been super helpful, and is accurate. The temperature gauge is fairly accurate in my 55 gallon tank. The temperature gauge is fairly accurate in my 55 gallon tank.

Overall Score
4.3


(658 Points)

3. Teco Tank TK-500 1/6 HP Aquarium Chiller

Teco US T143132 First Impressions

"I angled it."

The temperature has been holding all day, even in a colder room. The suction cups are large, high quality and seem to stick great. The temperature lights up so it's very easy to read. I like the fact that it comes with a digital thermometer. I bought a similar one at the pet store and it barely worked. I have it set to 81F to get a 77F water temp. The temperature lights up so it's very easy to read.

  • Teco Tank TK-500 1/6 HP Aquarium Chiller
  • For Typical Consumer Aquarium Sizes up to 130 Gallons
  • Built-in Heater, Rotatable Top Exhaust Conveyor and Magnetically-Affixed Filter Screen
  • Intuitive and Accurate Digital Thermostat Controller (ºF or ºC)
  • 1/6 Horsepower Motor and 450 Watts of Cooling Capacity
  • Made in Italy, 2-Year Limited Warranty
  • Manufacture: TECO Refrigeration Technologies, S.r.l.
  • Product Dimensions: 12.2 x 12.2 x 16.38 inches; 36.38 Pounds
  • Editor's Impressions Of The Teco US T143132
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Teco US T143132 Final Thoughts

"Will buy again."

I use a 50 for a 5 gal and a 10 gal tank. I love the heater otherwise, but I'm afraid some water has gotten inside the heater. Keeps the temperature within 1 degree of what you set it to at all times. I have a 10gallon tank that was at 72 degrees. I have 3 of the Fluval heaters, in various sizes. I left seller feedback yesterday but have yet to hear from the seller. You program it for temperature you want your tank to be.

Overall Score
4.0


(1 Points)

4. BOEESPAT Aquarium Heater 300W,Fish Tank Heater with Anti Scald Protector and Adjustable Thermostat S...

User Ratings: 51 24

BOEESPAT First Impressions

"FIVE STARS!"

I have it set to 81F to get a 77F water temp. The temperature gauge is fairly accurate in my 55 gallon tank. I contacted the manufacturer and they sent me a new unit in less than a week! If the blue light is flashing it means the heater is not fully submersible. There is a misconception on the internet that the heater isn't fully submersible. I'm not a big fan of the big glass tubes. The temperature gauge is fairly accurate in my 55 gallon tank.

  • BOEESPAT Aquarium Heater 300W,Fish Tank Heater with Anti Scald Protector and Adjustable Thermostat Suitable for Saltwater and Freshwater,One Extra Free Thermometer(40 to 60 gallons)
  • 300W aquarium heater is suitable for 40 to 60 gallons can be used in fresh water and salt water aquariums,easy to hide in the tank
  • Adjustable aquarium heater from 68°F to 93°F. A good temperature range for most fishes is 76°F to 80°F . An additional stick-on thermometer as a bonus to detect water temp at any time
  • Fish Tank Heater Explosion Proof,2mm thickened quartz glass Length - 14.5 inch,voltage 110-120V, power cord is 37.4ft
  • Made of high quality quartz glass, Waterproof double seal material , black protective container, shatter-resistant construction, ensures safe operation and keep your fishes from scalding and punching Heater
  • After set the temp you want, automatic switch device and temperature detection system, water heater will turn off automatically when its temp reaches your pre-set, also will turn on when lower than your set, relieved and simple operation
  • Manufacture: BOEESPAT
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The BOEESPAT
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

BOEESPAT Final Thoughts

"Best value."

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 adjusted the set temperature a little lower to be more in the range I wanted. Those turned out to be a hit and miss. At this time I highly recommend this product. I have a 10gallon tank that was at 72 degrees. The temperature difference was very minor.

Overall Score
3.6


(100 Points)

5. YCTECH Submersible Aquarium Heater with LED Water Thermometers for 1-35 Gallon Tropical Fish Tank, S...

User Ratings: 62 5

YCTECH First Impressions

"Amazing customer service."

Once attached to the tank wall I've had no issues with it coming off. But I am single and don't have to worry about this. The cover over the heating tubes is great, the turtles claws can't damage the tube. And kids love pushing all sorts of buttons. The line is there due to regulations in certain countries. We wish the controls were available in Farenheit also to make things a little easier. Those turned out to be a hit and miss.

  • YCTECH Submersible Aquarium Heater with LED Water Thermometers for 1-35 Gallon Tropical Fish Tank, Safe Adjustable Temperature Control, Electronic Water Heater Thermostat (50W / 75W / 100W / 200W)
  • 【Temperature Range】 15°C~34°C (59°F~93°F),it is suitable for fresh water and sea water fish tanks of ★ 1-10 gallons ★, provide comfortable environment for your beloved tropical fish ★ Submersible Use ONLY ★
  • 【 Smart Temperature Control 】 the micro chip will automatically keep the water in the fish tank at the temperature you set and keep it stable
  • 【Easy To Use】press the button of the thermostat to set the temperature,the temperature will changer within the cyclic temperature range ,just stop when you set it right
  • 【Power-Off Memory Function】 the aquarium heater will automatically remember the temperature you set before power off,you don’t have to set the temperature every time
  • 【Excellent service】24 hours customer service online, any questions please contact us at any time.If you are not satisfy with this Aquarium Heater for any reason in 30 days, we will refund the cost. you can return the new one for free if there is problem within a year.
  • Manufacture: CHOSION
  • Product Dimensions: 2.5 x 1.6 x 3.7 inches; 8.78 Ounces
  • Editor's Impressions Of The YCTECH
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

YCTECH Final Thoughts

"I bought the 7."

I got the 200W variant for my 54 gallon corner tank that's housing goldfish. When i installed them, i let them sit in the tanks without power for 6-24 hours. This little heater is perfect; this is our third purchase of the same heater. So far I like it setup was super easy. They promptly fixed the issue without any delays or drama. I hope these suction cups work very well. The heater is easy; turn the dial to set temp and plug in.

Overall Score
4.2


(79 Points)

6. 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
  • Quality
  • Value For Money
  • Affordability

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


(156 Points)

7. Ehm Heater Jager 300w

User Ratings: 72 7

Eheim First Impressions

"Works fine."

But I am single and don't have to worry about this. I noticed my old hygger heater beginning to fail and my wife ordered this one. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. Well I bought a second one took me only one trying to get the right temperature. So if you set it to 78 degrees, the heater will not kick on until it reads 76. No biggie, but annoying nonetheless. I went ahead and went with the the larger 300W for my 45 gallon.

  • Ehm Heater Jager 300w
  • Jager Trutemp Aquarium Heater 20" 300 Wt
  • Manufacture: EHEIM
  • Editor's Impressions Of The Eheim
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Eheim Final Thoughts

"Quality was amazing."

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. We would consider a replacement and then we would return the defective unit. The temperature has been holding all day, even in a colder room. It is a bonus that the heater is titanium. It just cycles through to 93f and starts over. Seems to keep the temp n the tank fairly regular.

Overall Score
4.4


(53 Points)

8. 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
  • Quality
  • Value For Money
  • Affordability

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


(1809 Points)

9. AQQA Aquarium Heater, 100W 200W 300W 500W 800W Quartz Glass Submersible Heater with LED Temperature ...

User Ratings: 86 5

AQQA First Impressions

"No worries, though."

The setting always stayed the same. Pressing and holding the button for 5 seconds changes it from F to C readouts. I bought a similar one at the pet store and it barely worked. But my guys don't read them and don't listen! Keeps the temperature within 1 degree of what you set it to at all times. The heater is being used in a 40 gallon breeder. And kids love pushing all sorts of buttons.

  • AQQA Aquarium Heater, 100W 200W 300W 500W 800W Quartz Glass Submersible Heater with LED Temperature Display and External Temp Controller for Freshwater and Saltwater
  • SAFE& DURABLE: Made of heat-resistant quartz glass and PC plastic cover, 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
  • INTELLIGENT AUTOMATIC HEATING: Automatic constant temperature function, design with External Temperature Controller, Temperature Range is 59ºF- 93 ° F (15 ° C- 34 ° C), Hold button at the top of the controller down for 5 seconds, switch easily from Celsius to Fahrenheit. It will restart to heating when the water temp is 1℉(1° C ) off the set temp. If power is shut off, the heater will keep the temperature settings until it powers on again
  • Digital LED Display: LED display on the middle of the controller front side, Current Temp and Set Temp. If your heater is working properly, the red light will be constant on. When the temperature is reached 93℉(34℃), it will stop work, the blue light will be constant on. When the heater exposed to air and is not fully submerged, then display the blue light and E1 fault
  • EASY INSTALLATION: Easy and quick installation, submersible fish tank heater, vertical or horizontal placement using attached adjustable hanging rack and 2 suction cups. 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
  • WIDE APPLICATION: Suitable for freshwater and saltwater aquariums. NOTE: Before you clean the aquarium or change water, please cut off the heater power, after 10 minute cooling then take out the heater. AQQA provide 12 Month Warranty and 24 Hour Professional After-sales Service. Please don't hesitate to contact us to get help
  • Manufacture: AQQA
  • Editor's Impressions Of The AQQA
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

AQQA Final Thoughts

"I like this heater."

I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. Per my thermometers, they are all staying constant. I'm not a big fan of the big glass tubes. I got the 200W variant for my 54 gallon corner tank that's housing goldfish. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. Come on Fluval, expect better from you. But my guys don't read them and don't listen!

Overall Score
4.7


(55 Points)

10. Submersible Aquarium Heater 100/300/500 Watt Fish Tank Heater with Dual Temperature Displays and Tem...

User Ratings: 74 12

BinChang First Impressions

"5 stars in my book!"

--Temperature adjustment labeling is on top rather than on the rod. What more could you ask for great job Hygger Duncan. --The heater itself is a bit shorter if your tank is a short one. The setting always stayed the same. So when I first received it it didn't work and I was very disappointed. Was very impressed with the quality of this heater. No biggie, but annoying nonetheless.

  • Submersible Aquarium Heater 100/300/500 Watt Fish Tank Heater with Dual Temperature Displays and Temp Controller Adjustable for Turtle Betta Fish Tank 5-130 Gallon
  • ❀【100 Watt Heater】This 100W is suitable for 5-25 gallons tank, heater length is 10.8 inches, power cord length is 47 inches+67 inches, please choose the right wattage aquarium heater according to our size chart.
  • ❀【External Temperature Controller】 This submersible aquarium heater is designed to control the temperature externally, which is convenient and safe for you to adjust temperature and no need to take the heater out from water and risk burning yourself.
  • ❀【Dual Temperature Displays】 It shows the water temp and set temp at the same time, helping you easily recognize and observe the temp change in real time even in the night!
  • ❀【High Quality】 It is made of shock resistant and shatter proof quartz for fresh or marine water. Besides, the heatproof cover will also protect you little fish from scalding.
  • ❀【PLEASE NOTE】 Aquarium heater should be fully submerged into the water. Please unplug the power supply when cleaning the fish tank, changing aquarium water or taking the heater out (and should let it cool in the water for a while before you take it out).
  • Manufacture: BinChang
  • Editor's Impressions Of The BinChang
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

BinChang Final Thoughts

"I have a betta in a 1."

Keeps the temperature within 1 degree of what you set it to at all times. The cover over the heating tubes is great, the turtles claws can't damage the tube. I will be ordering more of these in the future. I will be ordering more of these in the future. Now, both points are clear on the package instructions. Two inches above that is a waterline for maximum. Checked the accuracy of the heater with an infrared thermometer.

Overall Score
4.3


(36 Points)

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