Zoo Med BettaTherm Mini Size Betta Bowl Heater

By Zoo Med
Rated 1 out of 5 stars
$14.33Chewy Price
$15.79Chewy Price

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In Stock
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About This Item


  • Mini heater for fish tanks.
  • Completely submersible for your convenience.
  • Simply bury under the gravel at the bottom of your tank.
  • Designed to increase water temperature by 5 to 10 degrees.
  • Crafted to be safe to use with both glass and acrylic tanks.

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Questions & Answers

3 Customer Questions

What is the wattage?
Answer by ChewyOct 21, 2020
The Betta bowl heater is 7.5 watts.

Could the mini size beta bowl heater be used to keep hummingbird nectar from freezing?
Answer by ChewyAug 24, 2020
This heater is suitable for use in glass or acrylic tanks and bowls.

Will this work in a half gallon tank?
Answer by ChewyAug 31, 2021
This heater is suitable for 1 to 3 gallon fish bowls or tanks.

ReviewsWrite a Review

Rated 1 out of 5 stars
7 Ratings
Would recommend to a friend

7 Customer Reviews

Rated 1 out of 5 stars
By destinypratt826 on Mar 1, 2022

Betta Therm Heater

Has been in my fish bowl for a few days now. Does not work, the temperature of the water has not changed at all sense I put it in there.

Rated 1 out of 5 stars
By Bettafishlover500 on Dec 12, 2021

don’t BUY! less if you want to be a Fish abuser

A betta or no fish should have to live in such a small bowl and only live a few days because of such poor care please if you have a bowl at least buy a 5 gallon tank so you’re little fish Friend can live longer and happier ty.

Rated 1 out of 5 stars
By Kaitlyn on Jul 8, 2021

Does not work

IT does not work at all. I tried to unplug it and plug it in a different outlet thinking that was it’s problem. Not just does not work. Waste of money

Rated 1 out of 5 stars
By BkJen on Apr 16, 2021

Does not work

Did not work at all. Have no way of really knowing because there is no indicator light or temperature gage or any type of anything to even know if the thing is on. The read on my tank thermometer says the water is room temp and it should be warmer. How much warmer, who knows?

Rated 1 out of 5 stars
By MOM18 on Jan 25, 2021

Betta heater

Does not work! Waste of time, the only good thing about this heater is its inexpensive not even worth sending it back!

Rated 1 out of 5 stars
By Kate on Oct 17, 2020

Do not work.

I bought four of these for my betta’s separate small tanks exactly a month and a day ago and none of them work. A huge waste of money and am now having to redo my tank setup yet again and spend more money because these don’t work. I check temps twice daily and they are far too cold. Do not buy these!!

Rated 1 out of 5 stars
By MurrMenagerie on Sep 16, 2020

Don't waste your money

I bought this for my betta 1.5 + bowl. It did not get the water temperature past 70 degrees farenheit. Its difficult to maintain under gravel--it's just not worth it.