I use a Hydrofarm digital thermostat to control the "hot" side of the tanks for my two BPs. The probe is placed near the top of the substrate under the hide (which is over the heat mat.) I have it set at 90 and the thermostat does a great job of keeping the temperature a constant 88-92 degrees. I check the temps regularly with a digital infrared thermometer, and they are always close to perfect regardless of what the room temperature is. The problem I'm having is controlling the AMBIENT air temperature in the tank. I like to keep the ambient temp in the mid 80s, and the cool hide at 80. I use a ceramic heat emitter and it works well, but how to control it? We are not using heat or a/c in our house this time of year (I live in NC and springtime temps can vary greatly) so some days the air temp in the "snake room" is as warm as 80, but at night it can drop to as low as 62-65. I was considering buying a second Hydrofarm thermostat and connecting the ceramic heat emitters to it. Would that work? If I set the thermostat at 85 and placed the probe on top of the substrate in the middle of the enclosure, would the thermostat control the ambient air temp the same way it controls the temp above the uth? I'm not sure about this and would appreciate advice. Thanks!