GloFish Submersible Heater 50 Watts, for Aquariums Up to 10 Gallons, UL Listed,BLACK

Perfect for my fish tank. This little heater was very easy to install. It keeps the temperature of the fish tank exactly what it’s supposed to be.

Grabbed this unit for my veil tail Betta fish that happily resides in a 3-Gal fish tank. Since the moment I placed it in (with good water circulation), she started swimming towards it and enjoyed circling around it. This fish-tank heater has been working steadily and able to maintain a stable and ideal temperature that makes my Betta happy and stay healthy. Just one advice, please check and clean the heater periodically, the basic maintenance is still needed.

I have had this water heater for a little over two months now. It turns on and off just like it says and it keeps the water temperature in the proper range. Highly recommend.

Works fine but there is only one temperature setting and it is a bit warmer than I wanted. Worse fine and certainly not to warm so I am using it.

Great price!

Nice simple heater. All you have to do is plug it in and it does the rest. It keeps the water at or around 78 give or take a few degrees. I have bought a few for my tanks and will buy more when needed.

We used the unit for our Glofish tank. Worked great for the first 3 weeks but now the tank is about 71F which is the same as the room. I would not recommend this heater.

I wouldn't go anything larger than the stated 10gal capacity, it won't be able to keep up.