Review on YukiHalu Small Size Submersible Aquarium Heater: Accurate 1℉, Mini Fish Tank Heater 50W 100W with Thermometer & LED Display by Jessica Hill

I bought this product for my 10 gallon quarantine tank. It works for me because of the large dual display and its accuracy/thermostat is about +/- one degree Fahrenheit. The temperature is fully controlled by the external part of the thermostat. Thus, it is easy to raise and lower the temperature in one operation. The only part that gave me a bit of concern was the cage surrounding the heating element. I have a few small fish that will squeeze between the cage and the heating coil if they want to and may get stuck and/or get lost or injured when I transfer the fish. However, this issue will not prevent me from using this device in the future as far as I know.