Customer Reviews

Rating: 4.2 of 5 stars 44 Reviews 44 Reviews 4.2 out of 5 Stars

84% Recommend

84% of reviewersrecommend this product

Rating: 4.2 of 5 stars 4.2 / 5

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Marina Betta Submersible Aquarium Heater

Marina Betta Submersible Aquarium Heater

  • Most Helpful Positive Review

    Read All 34 Positive Reviews

    Betta Heaters

    By BriM on Feb 2, 2020

    Bought these on a whim and very pleased with them. I have temporary small tanks set up for quarantine of a few new betta and they maintain the temperature during the winter very well. Both tanks have thermometers to keep a check on temp. The only negative thing about these is that there is no set temp Bought these on a whim and very pleased with them. I have temporary small tanks set up for quarantine of a few new betta and they maintain the temperature during the winter very well. Both tanks have thermometers to keep a check on temp. The only negative thing about these is that there is no set temp on them. Thou there is a red light to know that it is on. … more

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  • Most Helpful Critical Review

    Read All 10 Critical Reviews

    doesn’t work

    By mjww on Mar 17, 2020

    I put this heater in my betta’s .5 gallon tank (it was at 78°). I woke up the next morning and the temperature was at 60°.

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3 Reviews

Showing 3 Reviews

  • 3 out of 5 stars

    Heats well but does not regulate temperature

    By on

    Our beta likes this heater and often swims around it repeatedly in his tank, which is just a bit larger than a gallon. It does not regulate temperature as advertised, however. We have come home to temps as high as 89 degrees and must plug and unplug this heater multiple times a day to regulate temperature. There must be a better way!

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  • 3 out of 5 stars

    Got too hot

    By on

    The heater itself definitely works in heating the water, unlike some other heaters. However it definitely does not maintain temperature as it advertises. I checked the temperature at 86 degrees which is too high for bettas. That would essentially cook them slowly. I gave 3 stars because it would work fine with a timer if you were determined enough to figure out the right balance and purchase a timer. However, the product advertises that it maintains temperature on its own, and it does not. Also the suction cup didn't work well for me. I agree with others that two suction cups may have been better.

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  • 3 out of 5 stars

    Little too warm

    By on

    I was amazed at how fast this shipped to my house. I'd like to start with that, so that's a plus. However, the water became too warm for my betta in her 1 gallon tank and I was too late. I think it's a great product but I wouldn't recommend the heater for a 1gal tank and under.

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