SUNGROW Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal -

SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal

By SunGrow
Rated 3.84 out of 5 stars

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$11.74Chewy Price
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This Item - SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal
Rated 3.84 out of 5 stars
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About This Item


  • Promotes the health and happiness of Betta by helping to ensure the water stays in their ideal temperature range.
  • Built-in electronic thermostat helps automatically maintain a water temperature around 75 degrees Fahrenheit without any manual adjustment.
  • Features a sturdy exterior and sealed polymer material that can be fully submerged into your tank. The heater is also surrounded by a thick plastic to help protect your fish.
  • Your indoor temperature must be approximately 62 to 75 degrees Fahrenheit, and the heater must be entirely submerged in the water for it to function.
  • Simple to attach either vertically or horizontally to your tank with its included suction cups.

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Fish TypeBetta, Tropical Freshwater, Goldfish, CichlidBettaBettaN/A, Marine Invertebrate, Tropical Freshwater...Tropical Freshwater, Betta, Cichlid, Goldfish, Marine Fish
Aquarium TypeFreshwaterFreshwaterFreshwaterFreshwaterFreshwater, Saltwater

Questions & Answers

8 Customer Questions

Can this be put in a plastic tank?
Answer by ChewyApr 20, 2021
SunGrow Halfmoon Betta Aquarium Heater can be used for plastic tanks.

Are these safe for a 2 gallon aquarium?
Answer by ChewyAug 04, 2021
The betta heater can support up to 2 gallon tanks.

Can this heater be used on acrylic tanks or will it melt?
Answer by ChewyApr 12, 2021
This heater can be used in an acrylic tank.

What does a red light mean? Does that mean it's on?
Answer by ChewyMar 29, 2022
The light will show when the heater is on. When the water temperature is under 74°F, the aquarium heater starts working. When the water temperature reaches higher than 77°F , the aquarium heater stops heating. This ensures that the temperature stays constant between 74-77°F (24-25 ℃) which is the ideal temperature for Betta.

ReviewsWrite a Review

Rated 3.84 out of 5 stars
25 Reviews
Would recommend to a friend

25 Customer Reviews

Filter by reviews that mention

Rated 3 out of 5 stars
By Dena on Jan 14, 2023

Stays too hot

I didn't want a non-adjustable heater for my 3gal tank, but had trouble finding one that didn't have crappy reviews. This one keeps my tank at 81°, just like other reviewers have stated. Too warm for my fish. I'm disappointed and will be returning this once I get a replacement.

Rated 4 out of 5 stars
By Sweets1973 on Jan 12, 2023

Works Great

I ordered this for my 1.5 gallon betta tank and it keeps the temperature within the required range. It is small so it does not take up much room in the tank. My betta has taken refuge at the top of it, which is odd because he has plants, leafs, and a tunnel to hide in.

Rated 4 out of 5 stars
By kittyhouse on Oct 26, 2022

perfect for betta

I bought this to keep my betta warm as we keep our house a little cooler in the winter due to heating costs. This was a perfect choice. Easy to use and quick to install. I took off 1 star because I thought it came with a thermometer on it but it doesnt, and because its on the bigger end and a bit too large for a 2gal tank.

Rated 1 out of 5 stars
By AshleyM2468 on Nov 26, 2022

Lights up but doesn't get warm

The heater lights up but after a few hours in the tank, the water is the same temperature as when I put in and when I touch the heater, it isn't even warm. I have a gallon and a half size tank.

Rated 5 out of 5 stars
By Brianna on Oct 16, 2022

Great quality

Had a hard time deciding on a heater because of all the scary reviews I've come across. I've had this one for five months now and it's still working great! I bought 2 so I have one for each of my fish tanks and I haven't had an issue with either of them.

Rated 3 out of 5 stars
By Kimberly on Jan 14, 2023

Missing thermostat

I received the water heater but it is missing the thermostat! Pls send the thermostat

Rated 3 out of 5 stars
By April on Sep 4, 2022

Keeps them toasty. Maybe too toasty.

This heater is keeping my now fishless cycling tank at a toasty 82 degrees F, a little on the warm side. I am probably going to find another small heater in store and keep this one as a back up, as it hasn't dropped below 81 degrees F

Rated 1 out of 5 stars
By Petro on Nov 3, 2022

Did not work

Although red light is on it does not warm up the tank

Rated 1 out of 5 stars
By Watermelon on May 15, 2022

Electric Shock

This heater seemed to work fine for a while. Then our betta fish started acting weird. He would hide in his house and only come out to eat. My husband put his finger in the water when feeding the fish and got a shock where he had a cut. He thought it was something in the water but when he poured the water over his cut he felt nothing. He unplugged the water heater and put his finger in the water again and no longer received the shock. The fish immediately started acting normal again, swimming around freely and no longer hiding.

Rated 4 out of 5 stars
By NTW27 on Jun 11, 2022

Its getting hot in here

I got this nice lil heater for a 5gal tank. I do wish there was a switch to turn the temp down, since thermometer says fish tank is 80. Luckily I don't have a fish yet since I was letting the tank cycle.