Ok.. I keep reading that I should have a thermostat with my heating arrangement. At the risk of sounding totally stupid, what do they look like? Do you plug the UTH into the thermostat, and then the thermostat into the electrical outlet? How does the themorstat know what the temp is in the tank? Does it have a probe? My heating has been pretty good since I figured out how to use my digital thermometer, but I have noticed flucutations in the temp. I figured it was due to the temp in the house, but some fluctuations have been a little erratic. I've read that themostats can be purchaced cheaply at Wal-Mart etc. What brands do you recommend?

Brandy