Review on Submersible Energy Efficient Controller Thermostat Thermometer by Ashley Carter

I was reluctant to purchase due to negative reviews saying their fish is cooked to death. Some people just went insane or forgot to take their meds, so you can't always trust reviews. The price was good and delivery took two days. give him a chance At first it didn't work and I thought I had a bad one. Read the manual and they say you'll see the little red light go on and off as the unit heats the water. It turns off when it reaches 78-80 degrees, I didn't have a red lightbulb. Turns out the extension cord socket I plugged it into wasn't making good contact. I threw it away and bought a new extension cord. Works great now. It's been a few months and the temp sticker he puts on the outside of the tank says 78 degrees. The temperature was measured with a baby thermometer. The beta fish is happy. works for 3-5 gallon tanks