I don't use uth but the last owner used one and didn't know it was a terrible choice. Temps are 86-87 warm side 82-83 cool side. I let the temps drop to around 75-78 during the night he's being treated for RI but his treatment started awhile ago and he's been getting better. He has this from the previous owner and its a good thing I purchased him in time. He's a great feeder. Some of this may be unrelated but its just some background info on the snake and that he was not well taken care of.