When you are using tile for the substrate, and an Under the tank heater--do you put anything down between the glass tank and the tile? I have a thermometer right on the tile and with the heater under the tank, and two 50 watt night (red) basking lights the tile gets up to ridiculous temperatures. 107-112 degrees F. I am thinking I will put a thin piece of styrofoam in between the tank and the tile.