This Tetra submersible 50-Watt heater is very easy to use for aquariums ranging from 2 to 30-Gallon. The electronic thermostat automatically adjusts heat output to keep the water at a constant 78-Degree Fahrenheit. All you have to do is put it in the aquarium and plug it in.
No adjustment required
Easy to conceal
Two year warranty
Please read all label information on delivery