In my 20 gallon tank I have a submursible 100watt (or volt, not sure) heater, I have it set at 30, Im trying to have it higher to get rid of cloudy eye, anyways, my thermometer, does not say 30 its at 26. I have tried another as well and its showed the same thing. My house is cool, its minus 10-minus 30 outside at night right now, I turn the heat down at night, so this MAY be the problem... shoudl I then turn my heater up to 32 and see what it does??
thanks for the help