Thanks for the responses everyone! I double checked the temps and the cool side is in fact at 80. Not as high as I previously mentioned. Basking temp was more like 88.

At any rate, he used to have an UTH, but it would get extremely hot and he would burrow in his bedding to place himself directly against it. He also only has 1 hide currently. I will invest in another.

I'm sorry if I sound stupid here, but what exactly is an ASF? I do not feed him in his enclosure, but in a separate, smaller tank.