Aqueon Glass Adjustable Aquarium Heater

By Aqueon
Rated 3.5397 out of 5 stars


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$39.95 (-18%)Chewy Price
$48.99Chewy Price

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About This Item


  • Perfect for easily maintaining the ideal water temperature for both healthy salt and freshwater community fish tanks.
  • Available in a wide range of the most common wattage sizes to provide a custom heating experience for any aquarium.
  • Precise temperature dial from 68 to 88 °F allows for complete control of aquatic climate within a 1-degree difference.
  • Durable shatter-resistant heater construction allows for completely submersible and safe aquarium temperature control.
  • Convenient power indicator light tells you when water is being heated, and the automatic shut-off feature helps ensure your fishes' safety.

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Play Video: Learn More About Aqueon From Our Team of Experts
Learn More About Aqueon From Our Team of Experts

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Fish TypeMarine Fish, Tropical FreshwaterBetta, Cichlid, Goldfish, Marine Fish, Tropical FreshwaterMarine Fish, Tropical Freshwater
Aquarium TypeSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, Freshwater

Questions & Answers

12 Customer Questions

How many watts should I need for a 10 gallon?
Answer by ChewyOct 24, 2019
Please refer to the picture chart below.

Does this have a built in thermostat to make sure the temperature is constant
Answer by ChewySep 12, 2019
This heater features a precise temperature dial from 68°F to 88°F which allows for complete control of aquatic climate within a 1-degree difference. It does not include a built in thermometer and will need to be purchased separately.

can the 50 watt be safely used in a 3 gallon fish tank?
Answer by ChewyMar 21, 2019
The 50 watt can be used in 3 gallon tanks and tanks up to 20-gallons. To ensure it will fit, compare the dimensions of your tank to the measurements of the heater which are 1.375 x 1.375 x 8.75 inches.

can I use two 50watt heater in my 20g tank?
Answer by ChewyApr 03, 2021
The 50w heater is rated for tanks up to 20 gallons. If you choose to use (2) 50w heaters or even a 100w heater, there wouldn’t be any issue. Just be sure when using 2 heaters, have them on opposite ends of eachother, not close together.

ReviewsWrite a Review

Rated 3.5397 out of 5 stars
63 Ratings
Would recommend to a friend

63 Customer Reviews

Rated 3 out of 5 stars
By 300watt on Jul 21, 2023

not for big tanks

I had to buy a second heater for my 55 gallon tank because it didn’t adequately heat. I’m sure if would be ok for small tanks though.

Rated 5 out of 5 stars
By Vika7 on Jun 2, 2023

Great heater

Best heater I’ve ever used and I’ve tried many! Use the 50 watt for a 20 gallon long Betta tank. Keeps water at perfect 79 degrees.

Rated 1 out of 5 stars
By junk on Mar 15, 2023

only worked for two days

This is by far the worst heater I have ever invested in. I placed it in a 75 gallon saltwater aquarium two days ago checked this morning and it is completely full of water and has put toxic chemicals inside of my salt water tank killing all fish. Do not buy!!

Rated 1 out of 5 stars
By Jane101 on Dec 4, 2022

Broke in under 2 months

I recently noticed that my tank is no longer warm and fish started to die off. Finally realized the heater was not working anymore and I bought it less than 2 months ago.

Rated 1 out of 5 stars
By bctardiff on Jan 21, 2023

heater just stopped working

Heater worked good for a few mouths then just stopped working

Rated 1 out of 5 stars
By Alex on Sep 16, 2022

Absolute Garbage

I have several older Aqueon heaters that have been heating tanks for years, but this model didn't even last 6 months.

Rated 5 out of 5 stars
By KIMBERLY on Nov 7, 2022

Works great

Works great, no issues at all keeps our large tank at temperature

Rated 1 out of 5 stars
By Bree on Jul 21, 2022

Don’t waste your money!

I bought 2 of these last month and they are both already dead! They were kept at 78 in 39gal breeder tanks so it’s not like they were over worked at all. Soooo disappointed!!

Rated 1 out of 5 stars
By Bren on Jun 5, 2022

Does not last

Horrible! I had the exact same one which lasted 3 yrs. This one 4 months. They are useless as the bulbs that die within a month that run $35. What happened to quality control and standing by a product?!

Rated 1 out of 5 stars
By blue08 on Jan 23, 2022

Very disappointed

I opened the box, put this heater in my tank, and the next day it was full of brown stuff and water. Very clearly leaked and now it's ruined. My tank water is cold and all my snails are closed.