I am heating my Stolzmanni's tank with side mounted heating pads and the I am keeping the tank around 80-82 degrees pretty consistently. But when you poke a finger into the soil in is noticibly cooler. Everyone says not to put heatmats under the tank because they bury themselves and could get burned but what do you do to heat the soil? I have the tank sitting on the carpet in my room so it is not just sitting on a cold surface. Any suggestions?