I just got an 18" Sonoran Gopher. I have been trying to get the heat right before I fed her. So I finally got a thermostat and I hooked it up with an UTH. I adjusted it and the temperature of the glass right above the heater is 94. The temp of the area above it with 3/4" of aspen is 82. I had more aspen over it, but the temp didn't change so I dug it out a little. Here is my worry. I want the temp at 85 on the surface(from what I have researched, this is ideal), but I am wondering how hot the glass can be before it is an issue. Should I turn up the heat more or dig out the aspen. Maybe there is another substrate that would conduct heat a little better? Thanks ~Alecia p.s I have added some pictures. I know the tank is bare but I am still working on it.