Review on 100W 200W Submersible Aquarium Heater with Temperature Display and External Controller for Betta, Frogs, Newts, and Turtles by Dawn Kemp

I bought this mainly because I could regulate the temperature without getting into the tank and it was very convenient. At the right temperature, the easy-to-read display takes the guesswork out of deciphering and maintaining the temperature in my tanks. It was well packaged, very easy to use and well made. Unlike many of my previous heaters I don't feel like making a wrong move and I have broken glass in my tank that needs cleaning, it's reliable.