I need to replace the heater on my 10g tank and would like opinions, recommendations, etc. for a good, reliable replacement. The heater I am replacing is one of the regular Tetra brand heaters from wally world and the thermostat on it seems to have stopped working. I came home last night and the water was very warm, as in relaxing bath warm, even though the heater has been set to 74-75 for the last several months. Luckily, I caught it before I lost any fish.