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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30 Reviews

Showing 1-10 of 30 Reviews

  • 5 out of 5 stars

    Perfect Heater for a Betta

    By on

    Works like a charm for my 2-gallon. It keeps the temperature of the water between 78 and 80 degrees.

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  • 5 out of 5 stars

    Excellent for my small aquarium

    By on

    I use this heater in my small aquarium and it keeps the water a steady temperature.

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  • 5 out of 5 stars

    Would Recommend!

    By on

    Bought 3, and my guppies and betas all seem to be satisfied, heats up pretty fast too

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  • 5 out of 5 stars

    Nice and Cozy

    By on

    I got a betta for my office. Being its in an older building and they don't keep the temp consistent. I could tell his water was getting colder than it should be. so I opted for an heater. I plugged it in and pop it in his tank and he loves it. He is always making his bubble nests and swimming around and being very social. Mr Blue is very happy fishy now.

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  • 5 out of 5 stars

    Happy Betta

    By on

    This heater is the perfect size for my 1.3 gal tank and fits neatly in the corner. Before purchasing the heater, I was taking out a quarter of the water and adding in new warm water everyday to keep my betta comfy. Now he is very happy and more energetic than ever! Very happy with purchase!

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  • 5 out of 5 stars

    Saved Them From The Cold

    By on

    I bought these in early November right when it was getting cold in Ohio and had (and still have them) in the tank. The water didn't even change the temperature in a polar vortex. Highly Recommend.

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  • 5 out of 5 stars

    Saved my Beta

    By on

    We live in the Northeast and our home can get cold overnight.. our beta was slipping into what we described as a cold coma... he wasn't eating, losing weight and barely moving. As a last ditch effort I bough this and it brought my little fishy friend back from the brink. He's swimming and eating again. I find he cuddled up next tp the heat when the house is cool..

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  • 5 out of 5 stars

    Small heater for beta

    By on

    This fit perfect in tank.keeps my beta nice and cozy.Cuts off automatically when reached temp.

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  • 5 out of 5 stars

    Perfect size

    By on

    This is the perfect size for our just over 1 gallon beta bowl. Our beta so needed a heater for the short winters here in Texas., after reading the reviews on Chewy.com I made the purchase and followed the suggestion of another chewy customer to plug it into a timer. It took about 12 hours to find and keep the temp at a constant 76. He is happy, I feel better, so yes without a doubt I recommend buying. ..,and a thank you to the chewy customer for the great advice to use the timer.

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  • 5 out of 5 stars

    Works great for the small aquarium.

    By on

    No need to worry that the house temperature will effect the water temp.

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