AQUEON Preset Aquarium Heater, 50-watt -

Aqueon Preset Aquarium Heater

By Aqueon
Rated 3.3178 out of 5 stars

$15.99Chewy Price
$20.99Chewy Price

In Stock
FREE 1-3 day shipping over $49

About This Item


  • Perfect for easily maintaining the ideal water temperature for both healthy salt and freshwater community fish tanks.
  • Heater is preset to 78 °F and is accurate within 1 degree, can be completely submerged, and requires no adjustments.
  • Available in a wide range of the most common wattage sizes to provide a custom heating experience for any aquarium.
  • Durable shatter-resistant heater construction allows for completely submersible and safe aquarium temperature control.
  • Convenient and secure design will automatically shut off if heater is no longer properly submerged, preventing damage.

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Learn More About Aqueon From Our Team of Experts

Questions & Answers

35 Customer Questions

Is this heater safe for a turtle? Or will it burn the turtle if it touches it?
Answer by ChewyJan 22, 2018
Although this heater is specifically designed for fresh and saltwater fish, pet parents have reported it being safe for their turtle's tank.

I realize how stupid this question is, as I'm sure it probably does. But, I like to be thorough. So, does this unit come with suction cups to hold it in place? And if so, can I mount this horizontally near the bottom of a tank, but above the gravel, without damaging it?
Answer by ChewyJan 25, 2018
Suction cups are included with this heater. The 50-watt and 100-watt include one, while the 100-watt and 200-watt bring two suction cups.

The light turns off after 1 min does that mean it's defective or is it supposed to do that
Answer by ChewyDec 19, 2018
This heater features an automatic safety shut off and overheat protection. Once plugged in, the heater will automatically start working. Should your water need heating, the indicator lamp will illuminate showing that the heater is functioning and in heating mode.

Is it normal for the red light to kick off and on?
Answer by ChewyMar 21, 2020
Should your water need heating, the indicator lamp, will illuminate showing that the heater is functioning and in heating mode.

ReviewsWrite a Review

Rated 3.3178 out of 5 stars
214 Reviews
Would recommend to a friend

214 Customer Reviews

Filter by reviews that mention

Rated 2 out of 5 stars
By Henrik on Mar 5, 2023

It does what it says. sometimes.

It’s keeping my turtle tank like 1-2° lower than 78 which is honestly just super inconvenient for a hatchling. The ambient temperature hasn’t changed either so I don’t know

Rated 1 out of 5 stars
By TomYumsMom on Nov 4, 2022

Junk. Awesome if you like to waste money though.

This dangnabit heater worked initially. I followed instructions because I'm not a dingbat. Everything was good. Then all of a sudden it decided not to work after like 10 days. Very sad. Must now buy new heater different brand. Chewy is still number one though.

Rated 1 out of 5 stars
By Debbie on Oct 30, 2022


BEWARE, i didn't pay attention but this is a preset 200w heater. I would never by for fish. only needed for daphnia and plants, but with it not adjustable i will not use for them either Returning .

Rated 1 out of 5 stars
By Mike on Dec 15, 2022

Not working

Does not work!! Waste of money! Arrived on time, but did not work at all.

Rated 5 out of 5 stars
By Grayzrayz on Sep 17, 2022


This water heater keeps my 5 gallon tank at a perfect 78 for my betta fish. The red light turns on when heating and turns off when the cage is at 78. Everything it said it would be.

Rated 1 out of 5 stars
By Addie on Oct 27, 2022

Don't buy this heater

Don't buy this heater, it overheated and killed all my fish.

Rated 4 out of 5 stars
By clyderiver77 on Apr 8, 2022

50W review - great for 10 gallons and less

If adjustable I would have given higher marks, but in our 10 gallon and 5.5 gallon it works great! You need to consider ambient room temp when picking power for your heater, not only the watt size. This one was able to take 60 degree Fahrenheit room temp and convert to 74-78 easily. Have only had this heater for 6 weeks, so can’t comment on longevity yet. For larger tanks, buying multiple heaters instead of one big one protects against one big catastrophic failure.

Rated 1 out of 5 stars
By KBell on Jan 19, 2022

Does not maintain temperature

I have had the heater for 3 months now and I noticed this morning that the water in my tank was in the 60s. I tried unplugging the heater and letting it sit for 10 minutes before plugging it back in. The heater would not turn on.

Rated 1 out of 5 stars
By turtle on Feb 7, 2022

very deceiving description -

I have TWO of these heaters in my tank and they don't heat the water at all. My turtle clings to the heaters to try to obtain some heat. I would never buy them again.

Rated 1 out of 5 stars
By poor on Mar 29, 2022

do not buy this!

did not work after a few days. Temp in 60s still. Do not buy this product!