Also in my very limited experience just because the probe from your thermostat says the temp is "X" degrees does not mean then surface temp of our enclosure is that same temp. I have two thermostats. The one on my cool side stays set at 80 degrees and keeps the surface of the floor at 78 degrees. The one for my hot side shows 92 degrees and keeps the tank floor at 88 degrees. You need an infrared temp gun to confirm what the temps actually are. I got one on Amazon for about 15.00 and it is very accurate.