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

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  • 2 out of 5 stars

    Temporary not lasting

    By on

    This worked well until it started losing warmth and eventually it stopped emitting heat after three months. I went to my local pet store and got a submersible undertank heater instead, better lasting.

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  • 2 out of 5 stars

    Runs Too Hot

    By on

    Made my tank run too warm, with the air temperature at 72 degrees and my v3v gallon tank went from 71 to 81 degrees .

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  • 2 out of 5 stars

    Too Hot for Bettas

    By on

    This heater kind of does what it says? In both my 1.3 and 3 gallon tanks it heated the water to 85 instead of 80 or less like it says for a space that size.

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