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. 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)

4. ZEETOON 25W Aquarium Heater, Automatic Thermostat Betta Fish Tank Heaters, Tortoise Small Water Warm...

User Ratings: 69 12

ZEETOON First Impressions

"Very quick shipping."

--The heater itself is a bit shorter if your tank is a short one. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. If the water runs low or air gets in the heater shuts off. But my guys don't read them and don't listen! I like the fact that it comes with a digital thermometer. Would be great to be able to tune that to. The red light means it's off, blue light means the temperature is constant.

  • ZEETOON 25W Aquarium Heater, Automatic Thermostat Betta Fish Tank Heaters, Tortoise Small Water Warmer for 2-5 Gallon Container with 1 Stick-on Thermometer Strip
  • 73ºF-82ºF Auto Thermostatic: ZEETOON Fish Tank Heater Betta Fish's Favorite Gifts, Suitable for all kinds of aquarium pets, Betta, tropical fish, goldfish, ornamental fish and turtles, can work in both brine and fresh water. Maintaining pleasant water temperatures in all seasons for your little fishes and turtles and will be no longer fear the winter! 1 Stick-on Thermometer Strip, Eliminate your worry of not confirming the heating temperature
  • Mini Sized More Fit: Specific perfect for mini aquarium under 5 gal/20L. Fully submersible compact betta fish heater for all shapes and materials fish tanks 1-2-3-4-5 gallon, whether it is glass or plastic, all can be used. ZEETOON Mini Heater provide a constant warm for your pet fish to stay healthy, suitable both for fresh and salt water. intelligent temperature regulate, very easy to use.
  • Automatic For Energy-saving: Adopted intelligent circuit board, with a precise sensing probe and thermostat heating system. Unlike other conventional heaters, need you to manually adjust the temperature. Our Smart Aquarium Heater just plug the power cable then it will work. It works will automatically turn on/off to achieve the setting temperature constantly and stably 73ºF-82ºF(25℃-28℃), Energy-saving life, you will be at your fingertips!
  • Smart For Your Safety : ZEETOON Mini Heater different from a manually adjusted heater. Our heater automatic temperature regulate on 73ºF-82ºF(25℃-28℃) , no need to set. Prevent electric shock and burns. Keep you and your family safe. Position it near a strong water flow for whole aquarium are in the same temperature. The outlet of filter is ideal. When there is a heater in the fish thak, do not put your hand in to the water
  • High Quality: Made by heat resistant ABS housing, sandy quartz filler and MCH Alumina ceramic heating system, anti explosion & cracking, it is scald-preventing for your pets and safe operation for you, safer and more stable to use. We provide 1 year quality assurance for this product, we will provide replacement items for any product problems within 1 year after your purchase it.
  • Manufacture: ZEETOON
  • Editor's Impressions Of The ZEETOON
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

ZEETOON Final Thoughts

"5 gallon tank."

The suction cups are large, high quality and seem to stick great. My fish likes to get close to it and he has never been hurt by it. 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. Keeps the water consistent and it's easy to adjust! I love the heater otherwise, but I'm afraid some water has gotten inside the heater. Two inches above that is a waterline for maximum.

Overall Score
4.2


(149 Points)

5. NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Adjustabl...

User Ratings: 55 17

NICREW First Impressions

"Thank you for reading."

Personally for me the housing doesn't bother me. --The heater itself is a bit shorter if your tank is a short one. Thanks for the great customer service! I got the 200W variant for my 54 gallon corner tank that's housing goldfish. There is a misconception on the internet that the heater isn't fully submersible. I tested it by unplugging and replugging it. Also I like how it shows both the current temperature and the set temperature.

  • NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Adjustable External Controller, Suitable for Freshwater & Saltwater Tank
  • Equipped with precise temperature probe, making the temperature difference within ±2ºF to provide ideal living environment for your aquariums
  • Safe and easy to use external controller help operate without getting hands wet, allow Celsius and Fahrenheit control from 68℉/20°C to 94℉/34°C
  • Automatically shut off will be activated if heater is no longer properly submerged, preventing damage
  • Ideal for freshwater and saltwater aquariums, aquaculture, glass containers, and hydroponic systems
  • 100 watts heater is designed for 10-25 gallon fish tank
  • Manufacture: NICREW
  • Editor's Impressions Of The NICREW
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

NICREW Final Thoughts

"Works fine."

210 gallon ones and one 90 gallon bow front tank. This heater is NOT fully submersible. This is only day one though, so I shall keep an eye one it. Per my thermometers, they are all staying constant. Once I opened the box i noticed the quality of the construction. This is only day one though, so I shall keep an eye one it. This this is amazing and is worth the money.

Overall Score
4.0


(109 Points)

6. Aquarium Heater 500W/800W/1000W/1200W, Double Heating Tubes, Fast Heating and Power Saving, External...

User Ratings: 55 36

TINTOR First Impressions

"Looks as advertised."

This has been in my fish tank for a few months now and it's been absolutely perfect! Maintains it well except when the weather is already warm then it over heats it. I was worried about the quality but I am thoroughly impressed with this heater! Product was received fast, works excellent! It is safe and dependable and comes with a one year warranty. Easy enough to let it run all the time. This heater is NOT fully submersible.

  • Aquarium Heater 500W/800W/1000W/1200W, Double Heating Tubes, Fast Heating and Power Saving, External Digital Temp Controller, Used for 50-160 Gallon Fresh/Salt Water Fish Tanks
  • 【PRECISE TEMPERATURE CONTROL】The built-in PID chip realizes rapid heating, smart constant temperature, stability and precision, temperature setting range is 68~93ºF and the temperature difference is within ±1ºF. The heater provides a comfortable living environment for your aquatic creatures
  • 【SAFE AND DURABLE】Explosion-proof quartz tube, special safety design for auto shut off when overheating or not fully submerged. The heater provides a super safe living environment for your fish.
  • 【REALTIME TEMPERATURE DISPLAY】The LED digital display controller displays the real-time water temperature and set temperature, so you can keep track of the fish tank temperature at any time.
  • 【HIGH-QUALITY MATERIAL】ABS plastic integral molding, no deformation, no softening, explosion-proof and anti-corrosion, no pollution, high insulation strength, suitable for both fresh water and sea water. The double-row suction cup bracket can stably fix the heater on any corner of the fish tank
  • 【Four Size Available】500W(50-80 gal), 800W(80-105 Gal), 1000W(105-130 Gal), 1200W(130-160 Gal).
  • Manufacture: TINTOR
  • Editor's Impressions Of The TINTOR
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

TINTOR Final Thoughts

"Long heater."

I love the heater otherwise, but I'm afraid some water has gotten inside the heater. This has been in my fish tank for a few months now and it's been absolutely perfect! Now, both points are clear on the package instructions. The temperatures are pretty accurate. Come on Fluval, expect better from you. The suction cups are large, high quality and seem to stick great. Very easy to install and the adjustable temperature gauge is pretty accurate.

Overall Score
3.5


(14 Points)

7. 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)

8. AquaTop Titanium Heater w/Controller

User Ratings: 70 7

AquaTop TH-C500 First Impressions

"Just bought a second one!"

It does blend well in some setups and may look bulky in others. I have only had minor problems with the suction cups. I hope these suction cups work very well. The setting always stayed the same. 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. This heater is NOT fully submersible.

  • AquaTop Titanium Heater w/Controller
  • Age Range Description: All Life Stages
  • Manufacture: Aquatop
  • Product Dimensions: 12 x 3 x 4 inches; 13.6 Ounces
  • Editor's Impressions Of The AquaTop TH-C500
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

AquaTop TH-C500 Final Thoughts

"Same suckers for years!"

For Discus you need warm and accurate heater and this seems to do the trick. Now, both points are clear on the package instructions. I love the heater otherwise, but I'm afraid some water has gotten inside the heater. So far I like it setup was super easy. Come on Fluval, expect better from you. We would consider a replacement and then we would return the defective unit. I left seller feedback yesterday but have yet to hear from the seller.

Overall Score
4.4


(119 Points)

9. PGFUNNY Aquarium Heater, Adjustable LED Digital Temperature Display Smart Thermostat Betta Fish Heat...

User Ratings: 63 15

PGFUNNY First Impressions

"FIVE STARS!"

It is safe and dependable and comes with a one year warranty. I like the fact that it comes with a digital thermometer. Once attached to the tank wall I've had no issues with it coming off. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. Maintains it well except when the weather is already warm then it over heats it. I'm not a big fan of the big glass tubes. Would be great to be able to tune that to.

  • PGFUNNY Aquarium Heater, Adjustable LED Digital Temperature Display Smart Thermostat Betta Fish Heater, for Betta Tank Heater with Protective Guard
  • 【Fully Automatic Temperature Control Chip】Heater for betta fish have a automatic thermostat 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.
  • 【Water shortage protection】During its heating time, the small aquarium heater must be 100% submerged into the water. This heater automatically shut itself off once it remove from water which ensures the safety of your pet fish.when fully in water again it will return to normal work again
  • 【Digital Display】With led display on the midle of the heater front side, Long press on fish tank heater switch to switch between Fahrenheit / Celsius display. External temperature setting avoids getting hands wet, digital LED display shows real time water temperature. Heating temperature range from 68 to 94°F.
  • 【Suitable for aquarium pets】: Betta Heater Suitable for all kinds of aquarium pets, betta fish, tropical fish, goldfish, ornamental fish and turtles, can work in both brine and fresh water. All shapes and materials betta tank, whether it is glass or plastic, all can be used.
  • 【CE Certification】: The aquarium thermometer made by heat resistant ABS housing, sandy quartz filler and MCH Alumina ceramic heating system, anti explosion & cracking, keep your fish from scalding.This product have certificated by CE, ROHS, FCC certifications.
  • Manufacture: PGFUNNY
  • Editor's Impressions Of The PGFUNNY
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

PGFUNNY Final Thoughts

"And I am glad I did."

--The cylinder or rod diameter is bigger. It's pretty noticeable, but I don't really care. This is only day one though, so I shall keep an eye one it. I wouldn't buy any other heater, unless one of these stops working. The heater is being used in a 40 gallon breeder. I emailed the email it says to and told them. I used to try those other cheap heaters sold on amazon.

Overall Score
4.1


(192 Points)

10. PASTE 300W 500W Aquarium Heater Submersible, 50-90 Gallon Fish Tank Heater with Durable Quartz Glass...

User Ratings: 68 11

PASTE First Impressions

"Same suckers for years!"

Personally for me the housing doesn't bother me. And I get to keep the first one I bought! The temperatures are pretty accurate. It is safe and dependable and comes with a one year warranty. It would stick out of my 30 g wide tank if I were to put it vertical. This does a great job at regulating the temp in my 10 gallon. When i installed them, i let them sit in the tanks without power for 6-24 hours.

  • PASTE 300W 500W Aquarium Heater Submersible, 50-90 Gallon Fish Tank Heater with Durable Quartz Glass and Protective Sleeve 3 Suckers Auto Thermostat for Fresh-Water and Salt-Water…
  • [SAFE AND DURABLE]: High quality Quartz Glass has Explosion-proof Shatterproof Shield-proof Design than conventional glass. Extra protective Sleeve updated for Anti-melting anti punching prevents electricity leakage, multiple sealed material. Provide the safety of living environment for your aquatic creatures
  • [USED WIDELY]: This 300W Fish Tank Heater is suitable for aquariums from 50 to 80 gallons (150-250 liters), is great for both Fresh Water and Marine Water aquariums, and you can choose the appropriate temperature for your fish, turtle, and plants.(The suitable temperature range for most tropical fish is 76°F to 80°F/24°C -27°C )
  • [ACCURATE THERMAL CONTROL]: Set and adjust the desired temperature with the use of the Temperature Controller on the top. The adjusting range is between 68°F~94°F (20°C~34.5°C),which allows for complete control of aquatic climate within a 2-degree difference. The small dot between each 2 numbers means 2 degree. At the same time has the automatic constant temperature function, builds the overheat and the water shortage protection mechanism
  • [INSTALLATION EASILY]: The 300 watt heater aquarium comes with 3 powerful suction cups to help you easily mount the heating rod vertically or horizontally in the tank, preferably horizontally near the water inlet and outlet to ensure that the tank is warm in all corners.
  • [SATISFACTION GUARANTEED]: Our fish tank heater 300 watt 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, our customer service staff will respond within 12 hours and provide professional after-sales service. We hope to hear your advise the first time. Please be sure to leave a comment for us after you purchase. Thank you for your choice.
  • Manufacture: PASTE
  • Product Dimensions: 16.5 x 1.4 x 1.4 inches; 14.67 Ounces
  • Editor's Impressions Of The PASTE
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

PASTE Final Thoughts

"Buy with confidence!"

Two inches above that is a waterline for maximum. It comes with a hanging kit and can be secured on the edge of the tank. Sometimes it gets outside of it's ability to cool but only within a few degrees. This has the best controller that I have found on the market. I was worried about the quality but I am thoroughly impressed with this heater! I have it set to 81F to get a 77F water temp. This product came in the nick of time!

Overall Score
4.3


(67 Points)

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