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

By SunGrow
Rated 4.2353 out of 5 stars
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SunGrow Submersible Betta Fish & Turtle Aquarium Tank Water Heater, 10-watt, up to 5-gal slide 1 of 7
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SunGrow Submersible Betta Fish & Turtle Aquarium Tank Water Heater, 10-watt, up to 5-gal slide 1 of 7
$15.95Chewy Price
$25.99Chewy Price

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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, CichlidBettaTropical Freshwater, Betta, Cichlid, Goldfish, Marine FishN/A, Marine Invertebrate, Tropical Freshwater...Tropical Freshwater, Betta, Cichlid, Goldfish, Marine Fish
Aquarium TypeFreshwaterFreshwaterFreshwater, SaltwaterFreshwaterFreshwater, Saltwater

Questions & Answers

10 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 4.2353 out of 5 stars
17 Reviews
Would recommend to a friend

17 Customer Reviews

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.

Rated 5 out of 5 stars
By Elizabeth on May 3, 2022

Works great

I purchased two Sungrow heaters for my small tanks. I've only had them for a few days, but they are both working great. The tanks are no longer cold to the touch and I love that I don't have to do anything, it does it all for you. Small but powerful.

Rated 5 out of 5 stars
By HikerBob on May 12, 2022

Aquarium Heater

Does what it's supposed to do. It keeps the water at a constant temperature. Turns on when the water cools down, and turns off when the water is at the pre-set temperature .

Rated 5 out of 5 stars
By Rango on May 7, 2022

Works great!

At first, I was afraid it wouldn't be hot enough, but it works fine for my four-gallon biOrb. The suction cup is pretty strong and could stick to a domed surface. Really sleek design!

Rated 1 out of 5 stars
By Gaby on Jun 13, 2022

do not get

After just under two months this heater no longer works and my poor fish was freezing. Do not get. Not reliable.

Rated 5 out of 5 stars
By Fishheater on Mar 3, 2022

Amazing fish tank heater !!! I use it in my 6 gallon tank as well

I love this tank heater. Works great And the temperature stays very consistent. The red light turns on when it’s heating up and turns off when it has reached the max temperature I believe it is 80°F is the max temperature it might be a little bit lower than that. Also make sure you read the directions thoroughly and do not turn it on outside of water

Rated 5 out of 5 stars
By householdr2 on Jan 22, 2022

Easy to install; convenient and no-fuss.

This little heater is great for my 2.5 gallon tank. It’s easy to install-uses a suction cup at the top and the bottom to keep it flush with the tank wall and it’s thermostat-driven for no-fuss operation. It keeps my little tank at 77° to 78°F. It’s low profile and the little red light lets you know when it’s on or when it’s off, which is controlled by the thermostat. I think this is a must for keeping tropical fish.

Rated 5 out of 5 stars
By Appletini on Feb 22, 2022

Great product!

My daughter's betta fish looked lifeless in his bowl. The bowl was cold to the touch. We bought this heater and the fish starting to swim around and look healthy again! Huge difference in the quality of his life!

Rated 5 out of 5 stars
By Troy on Feb 27, 2022

Wonderful Heater

Love this heater. No thermostat to mess with. Second one for our second tank and both work great at keeping our 2 gallon Betta tanks the perfect temperature.