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 [star rating='4.4']
  • Quality [star rating='4.4']
  • Value For Money [star rating='3.8']
  • Affordability [star rating='4.3']

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

[star rating="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 [star rating='4.8']
  • Quality [star rating='4.7']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='5']

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

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

3. Eheim Thermocontrol e250 Heater, Black (AEH3638090)

Eheim AEH3638090 First Impressions

"It is a bit pricey."

I contacted the manufacturer and they sent me a new unit in less than a week! Ick for instance detaches from fish at 86 degrees and dies at 89. At this time I highly recommend this product. Those turned out to be a hit and miss. This heater is NOT fully submersible. Ick for instance detaches from fish at 86 degrees and dies at 89. The design is sleek and modern looking.

  • Eheim Thermocontrol e250 Heater, Black (AEH3638090)
  • Advantages of the EHEIM control heater thermocontrol-e Precise temperature adjustment from 68°F to 89°F (20 to 32°C) No readjustment necessary Control accuracy 0. 5 °C The heat is kept constant Control lamp indicates the heating function (red: heating up; green: temperature reached) Fully submersible (waterproof) With dry-running protection (Thermo Safety Control) Glass coating increases the heating surface and ensures optimum, even heat output Including double suction holder Many sizes for aquariums from 5 to 300 gallons Suitable for fresh and marine water Highest safety and reliability Made in Germany Specifications Wattage: 250W Temperature setting range: 68°F to 89°F (20 to 32°C) Aquarium Size (approx. ) 106-159 Gallons Height: 17. 4" Power Cord Length: 5. 5'
  • Item Package Height: 3.0
  • Item Package Length: 25.0
  • Item Package Width: 3.0
  • Manufacture: Eheim
  • Editor's Impressions Of The Eheim AEH3638090
  • Heat Quality [star rating='5']
  • Quality [star rating='4']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.5']

Eheim AEH3638090 Final Thoughts

"Perfect heater for my 2."

It took me a few days slowly turning the dial up to finally get it where I wanted. I like how the heater is constructed. The bonus digital thermometer it came with has been super helpful, and is accurate. The heater protector was very heavy plastic and slim lined which is great. This has the best controller that I have found on the market. You don't have to worry about wide temperature swings with this unit. This is only day one though, so I shall keep an eye one it.

Overall Score
5.0

[star rating="5"]
(2 Points)

4. HITOP Adjustable PTC Aquarium Heater, 100W 200W 300W Submersible Fish Tank Heater for 10-120Gal Fres...

User Ratings: 72 5

HITOP HP-M3 First Impressions

"One word of caution."

So if you set it to 78 degrees, the heater will not kick on until it reads 76. I confirm it with my cooking digital probe thermometer. I recieved this product without the instructions or the added thermometer. The line is there due to regulations in certain countries. 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! So far I like it setup was super easy.

  • HITOP Adjustable PTC Aquarium Heater, 100W 200W 300W Submersible Fish Tank Heater for 10-120Gal Freshwater and Saltwater Fish Tank
  • [PTC ceramic heating element] Compared with the fish tank heater heated by resistance wire, this 300W PTC ceramic fish tank heater has the obvious advantages of high heating efficiency, low energy consumption, long service life and anti-rust.
  • [Adjustable and easy to use] Adjustable rang is 63-90°F. After set the temp you want, when the tank-temp reaches the set-temp, it will stop heating auto, and when the tank-temp is lower than the set-temp, it will start heating auto, easy to operate.
  • [Accurate] The ultra-sensitive internal temperature detection system can sense the tank-temp change in time, so that it can be heated and stopped in time to keep the fish at a comfortable temperature. Therefore this fish heater can also avoid overheating.
  • [Removable protective shell] This aquarium heater has a detachable protective shell, which can not only prevent aquarium pets from being injured by touching the heating part, but also can be easily removed for cleaning.
  • [Compact design/60-120gal] Size: 11.4*2.2*1.2in, simple rectangle design, not only easy to hide, but also save space. This 300W aquarium heater is suitable for 50-120 Gallon large and medium-sized fish tanks and turtle tanks.Comes with 4 suction cups and a stick-on thermometer.
  • Fast heating
  • Power saving
  • Can be used for marine fish tanks
  • Manufacture: Haisen
  • Product Dimensions: 11.4 x 2.2 x 1.2 inches; 1.24 Pounds
  • Editor's Impressions Of The HITOP HP-M3
  • Heat Quality [star rating='4']
  • Quality [star rating='3.6']
  • Value For Money [star rating='4.4']
  • Affordability [star rating='5']

HITOP HP-M3 Final Thoughts

"No copper lines!"

I waited a little bit to write the review so it could be accurate. This has been in my fish tank for a few months now and it's been absolutely perfect! I wouldn't buy any other heater, unless one of these stops working. The design is sleek and modern looking. The temperature has been holding all day, even in a colder room. This has been in my fish tank for a few months now and it's been absolutely perfect! This has been in my fish tank for a few months now and it's been absolutely perfect!

Overall Score
4.4

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

5. hygger 300W Controllable Aquarium Heater, Submersible Quartz Thermostat with Built-in Thermometer fo...

hygger First Impressions

"5 or even."

My fish likes to get close to it and he has never been hurt by it. This has been in my fish tank for a few months now and it's been absolutely perfect! The heater protector was very heavy plastic and slim lined which is great. Also I like how it shows both the current temperature and the set temperature. It took me a few days slowly turning the dial up to finally get it where I wanted. Was very impressed with the quality of this heater. I will be ordering more of these in the future.

  • hygger 300W Controllable Aquarium Heater, Submersible Quartz Thermostat with Built-in Thermometer for Fish Tank 30-60 Gallon, for Fresh Water, Salt Water
  • For Fish Tank 30-60 gallon, suitable for fresh water or marine aquariums
  • Fully submersible heater will auto shut off once the water temp is over 97℉
  • With a detachable platic guard, well protect fish and the heater
  • Set the temp on an external controller: 75, 77, 79, 81, 83, 85, 87, 89, 91
  • The power cord is 5.4ft enough long for most fish tank.
  • Manufacture: hygger
  • Editor's Impressions Of The hygger
  • Heat Quality [star rating='4.5']
  • Quality [star rating='4.6']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='4']

hygger Final Thoughts

"Just bought a second one!"

It does blend well in some setups and may look bulky in others. So when I first received it it didn't work and I was very disappointed. Once I opened the box i noticed the quality of the construction. I use a 50 for a 5 gal and a 10 gal tank. I will be ordering more of these in the future. It took about an hour to reach 80f, which is fairly quick. Temperature is slightly off by running a little warmer.

Overall Score
5.0

[star rating="5"]
(2 Points)

6. Aquatop Quartz Glass Submersible Heaters (50W-300W)

User Ratings: 67 6

AquaTop GH-50W First Impressions

"Works as intended."

My fish likes to get close to it and he has never been hurt by it. You don't have to worry about wide temperature swings with this unit. I like to keep it at 72 and from my thermometer it is reading at exactly 72. This product came in the nick of time! I recieved this product without the instructions or the added thermometer. It's pretty noticeable, but I don't really care. --The heater itself is a bit shorter if your tank is a short one.

  • Aquatop Quartz Glass Submersible Heaters (50W-300W)
  • Tank capacity: up to 13-gallon
  • Voltage/freq: 110-120volt/60hertz
  • Power: 50-watt
  • Easy to use temperature setting
  • Fully submersible
  • Manufacture: Aquatop, Inc.
  • Product Dimensions: 9 x 1.5 x 1.5 inches; 10.41 Ounces
  • Editor's Impressions Of The AquaTop GH-50W
  • Heat Quality [star rating='4.3']
  • Quality [star rating='4.7']
  • Value For Money [star rating='3.4']
  • Affordability [star rating='4']

AquaTop GH-50W Final Thoughts

"Works great."

I'm in the process of setting up for tanks. Also were nice along the whole process. The line is there due to regulations in certain countries. I went ahead and went with the the larger 300W for my 45 gallon. Ick for instance detaches from fish at 86 degrees and dies at 89. This is a great heater that is very easy to set up and program. We would consider a replacement and then we would return the defective unit.

Overall Score
4.4

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

7. Poafamx 5gal Aquarium Chiller 20L Fish Tank Water Cooling System Temperature Constant Quiet for Home...

User Ratings: 15 16

Poafamx First Impressions

"And I am glad I did."

And kids love pushing all sorts of buttons. The heater is super thin and the reflective surface is interesting. This has the best controller that I have found on the market. But my guys don't read them and don't listen! At this time I highly recommend this product. But I am single and don't have to worry about this. I will definitely be buying another one for my other tanks at bigger one.

  • Poafamx 5gal Aquarium Chiller 20L Fish Tank Water Cooling System Temperature Constant Quiet for Home Use Jellyfish Coral Aquaculture 110V with pump (20L Chiller)
  • [ADJUSTABLE CONSTANT WATER COOLER HEATER] The aquarium cooler has real-time monitoring of water temperature, automatic constant temperature
  • [LOW NOISE] Imported electronic components design, cooling/ heating without noise
  • [ENVIRONMENTAL PROTECTION] Using electronic refrigeration technology, environmental protection and no emissions
  • [SMALL AND CONVENIENT] Small size, light weight, easy to store and carry, easy to install and clean
  • [WIDE RANGE OF APPLICATION] Widely used in homes, aquariums, fish tanks, fish farms, and other fields. Also suitable for aquatic creature, aquaculture, fish, crystal shrimp, coral and jellyfish
  • Heat dissipation
  • Quiet fan
  • Quiet fan design
  • Manufacture: Poafamx
  • Item Weight: 4.33 pounds
  • Editor's Impressions Of The Poafamx
  • Heat Quality [star rating='2.7']
  • Quality [star rating='2.4']
  • Value For Money [star rating='2.7']
  • Affordability [star rating='2.5']

Poafamx Final Thoughts

"I like the size."

This does a great job at regulating the temp in my 10 gallon. So when I first received it it didn't work and I was very disappointed. I'm not a big fan of the big glass tubes. I like to keep it at 72 and from my thermometer it is reading at exactly 72. I dont know, and havent tried just yet. My fish likes to get close to it and he has never been hurt by it. I will definitely be buying another one for my other tanks at bigger one.

Overall Score
3.0

[star rating="3"]
(7 Points)

8. Aquatop Nano Aquarium Heater, 15-Watt (2.6 To 4 Gallon Aquariums / 77 Degree Fahrenheit Preset Tempe...

User Ratings: 41 30

AquaTop BC003408 First Impressions

"Same suckers for years!"

Keeps the water consistent and it's easy to adjust! Takes a little while to drop the temps if it is hot in the garage. Sometimes you may have to tinker around with the dial. The temperature difference was very minor. This has been in my fish tank for a few months now and it's been absolutely perfect! Those turned out to be a hit and miss. Once I opened the box i noticed the quality of the construction.

  • Aquatop Nano Aquarium Heater, 15-Watt (2.6 To 4 Gallon Aquariums / 77 Degree Fahrenheit Preset Temperature)
  • Unbreakable with Reinforced Plastic, Designed for 2.6 to 4 Gallon Nano Aquariums
  • Precise Electronic Thermostat Pre-Set at 77 Degrees
  • Shuts Down When Target Temperature is Reached
  • Temperature Controlled Accuracy of Plus or Minus 1.8 Degrees Fahrenheit
  • Built-In Suction Cups for Quick Installation
  • Manufacture: Aquatop
  • Product Dimensions: 0.75 x 0.88 x 5.38 inches; 5.6 Ounces
  • Editor's Impressions Of The AquaTop BC003408
  • Heat Quality [star rating='4']
  • Quality [star rating='2.3']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='3.9']

AquaTop BC003408 Final Thoughts

"I like the size."

I love the heater otherwise, but I'm afraid some water has gotten inside the heater. The heater is super thin and the reflective surface is interesting. All seem to vary between 1-2 degrees of each other which doesn't concern me much. Temperature is slightly off by running a little warmer. Maintains it well except when the weather is already warm then it over heats it. Keeps the water consistent and it's easy to adjust! You program it for temperature you want your tank to be.

Overall Score
3.2

[star rating="3.2"]
(166 Points)

9. HONUTIGE Aquarium Chiller Fish Tank Cooling Fan, Mini Aquarium Cooling Fan, Quiet Energy Saving Temp...

User Ratings: 64 36

HONUTIGE First Impressions

"Will not switch!"

Now, both points are clear on the package instructions. I use this little heater for my 10 gallon quarantine tank. The temperature difference was very minor. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. Temperature is slightly off by running a little warmer. We would consider a replacement and then we would return the defective unit. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank.

  • HONUTIGE Aquarium Chiller Fish Tank Cooling Fan, Mini Aquarium Cooling Fan, Quiet Energy Saving Temperature Control Clip-On Chiller with Adjustable Angle for Salt/Fresh Water
  • Powerful Temperature Cooling System - Aquarium Cooling Fan can continuously provide strong and uniform wind, effectively accelerate the heat dissipation
  • Energy Saving & Low Noise - Lower power consumption, little noise, large air output, quickly dissipate the heat of aquarium. Adjustable fan base, change the direction of air flow, adding oxygen to water.
  • Features - These fans can be used on their own, or in conjunction with an automatic temperature controller.
  • Easy to Install - Easy installation on the glass fish tank.With plastic protection frame, durable and practical.
  • 3 Model TypeS in Available - Different fans of 2/3/4 heads to suit a range of aquarium sizes.
  • Manufacture: HONUTIGE
  • Product Dimensions: 12.6 x 3.94 x 3.15 inches; 0.35 Ounces
  • Editor's Impressions Of The HONUTIGE
  • Heat Quality [star rating='4.2']
  • Quality [star rating='4.1']
  • Value For Money [star rating='4.3']
  • Affordability [star rating='2.5']

HONUTIGE Final Thoughts

"Just bought a second one!"

For Discus you need warm and accurate heater and this seems to do the trick. I will be ordering more of these in the future. I noticed my old hygger heater beginning to fail and my wife ordered this one. This little heater is perfect; this is our third purchase of the same heater. I used to try those other cheap heaters sold on amazon. The heater is easy; turn the dial to set temp and plug in. The heater is super thin and the reflective surface is interesting.

Overall Score
3.5

[star rating="3.5"]
(3 Points)

10. 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)

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