That tank is way too big and bare IMO. He needs a lot of hiding spots, a hide (identical) on the hot and cold side, and I'd pick up a good digital thermometer to measure temps and a temp gun to check direct hot spot temps (or you can get a digital themometer with a probe and put that on the hot spot, under the substrate). I don't like those sticky thermometers, they've never been acurate for me. Are you using a UTH or flexwatt for the hot spot or just a lamp?