Calibrate All-Glass Heater??
I have a 55 gallon tank with an All-Glass Heater. I believe it's a 200-watt -- it came in the setup I purchased at Petsmart. It heats just fine; the only problem is that it doesn't seem to be calibrated correctly. I like to keep my tank in the 78-80 degree range, but to do that I have to keep the heater set at about 71 degrees. ???? It keeps the temp very steady, but this just kind of bugs me. Is there a way to calibrate the heater so it will read the actual temp?