Aqueon 15-Watt Aquatic Flat Heater - Perfect for Your Fish Tank

Glenna Phillips: I like the design but it's not adequate to heat a 5 gallon tank. I was cycling a new tank to move my beta into and the temperature never reached more than 71 degrees. The size is too large to fit a smaller tank. Very disappointed.

United States on Dec 25, 2023

Troy Huckendubler: It works great, but it's super big. I have a 5 gallon cube tank, and it took up 1/3 of the back side

United States on Nov 12, 2023

Dan: works very well keeping my 3 gal tank warm. i’d say it’s around 80 degrees and the fish seem comfortable. it’s large in surface area but slim

United States on Nov 12, 2023

Krystal: Perfect for my betta. I would say this more or less maintains the temperature. I have a 5 gallon tank, it raised the temp 4 degrees (from 73 to 77) and now it basically just maintaining that temp, but it isn't going up any more (which is perfect for me). No temperature control, no shutoff. Bare minimum but great for the price and works.

United States on Feb 01, 2023

Joshman: It says it’s for a 10 gallon tank but the packaging says 6 gallon so it’s a little small for my ten gallon

Canada on Mar 07, 2022

M Ryan: I liked the form factor - thin and flat, but was disappointed in that it does not have or maintain a preset temperature. My bad for not reading the product description. Comes in sealed hard plastic that must be cut to open, so i didn't return it. Rather kept is as an emergency backup.

Canada on Mar 01, 2022

J.Smith: I have a Fluval Edge, they are 6 gallons, and this heater didn’t work from day one.
Give this one a miss.

Canada on Sep 19, 2021

Amazon Customer: I am returning this heater it’s wrong description I have a 5 gallon tank and it’s not heating up my full tank I wanted to wait for a day to see if it would and the water is still cold, this is meant for even smaller tanks , Not up to 10 gallons

Canada on Nov 19, 2020

Leslie: I found the heater is pretty big for any tank smaller than 10g. Other than that, it works well. I use it for my 6g tank and it keeps the temp around 27-29C, which is quite high. I might only use it at night or in the winter.

Canada on Jun 26, 2020

MHbus: I have this aquarium: https://amzn.to/2Q1wjiT

It's 3 gallons, I previously had a smaller aqueon heater, but I was getting a better fish and so i wanted one that made it warmer. if you're researching aquarium heaters, you probably ran into the same problem that I did. I was looking for an adjustable heater that wasn't too big, had good reviews on amazon (so many listings i read had the same problem listed on multiple reviews), and was 25 watts or lower.

I bought another heater before I bought this heater. That heater had problems. The cord was too short, and the heater was way longer than the image on the amazon listing made it look. Also the knob was bright and stood out. So it was unusable and I returned it.

If you buy this heater, you need to know that it _isn't_ adjustable. Furthermore, I dont believe that it's even preset at a specific temperature. Basically what this heater does is it's going to raise your water temper a certain amount of degrees above whatever the ambient temperature is. So how much warmer it makes it is going to depend on what the temperature in your house is an how much water you have.

My house is usually 70...

United States on Mar 09, 2020