AQUANEAT Aquarium Heater, 25W Small Betta Fish Tank Heater, Mini Preset Water Thermostat with a Thermometer

Everything works very well. Love the small size of the heater. I wasn't sure if I'd like the thermometer but it is quite neat and handy. Would buy again.

This was a cheap unit and it sure functions as one. The suction cup got mucky and useless after the first water change (one month). When removed from water, instead of being a reasonable temperature, it automatically goes into high gear and burned the wash rag it was resting on while I was cleaning.Should I have unplugged it? Probably - but should a device that automatically heats steel coils up have an auto off or safety feature?You betcha.My fish is warm, wallet didn’t mind it, but it’s absolute junk.

This heater is perfect for beta fish. Set to the correct temperature so it will always be correct for your fish.

The suction cup is inverting and not suctioning yo the glass. It has harden and won’t hold it shape🙄 I haven’t even had it a full two months.

Inexpensive and does the job nicely for my little 5 gallon tank that houses African Dwarf Frogs and a Betta fish. Keeps it around 76 on average which is perfect for the creatures that inhabit the tank.

I was looking for a heater for my small 3 gallon tank. This was perfect, very compact and heated the water well.

Installed in turtle tank about 5 gallons of water. In cold days don't expect to heat anything up.

My daughter's betta fish couldn't resist and died even before this was delivered. Order Cancelled. At least refund was processed promptly.