Okay here goes. When I put the thermometer probe on top of the substrate, it reads at about 85-86F, but when I put directly up against the glass with NO substrate on top of it, it read around 90F. When I cover the probe with substrate it gets to around 95-96F. Is, this a problem? I never see her burrow, and I have never seen any tunnels in the aspen, but is a high risk, or what? I have a ZOOMED rheostat set to the lowest notch but I think I'm going to get a self-adjusting thermostat. Would do you think? :shrugs: