Thank you all so much for your advice! I'll look into making some of the changes you suggested. I have my heat gun now and it looks like the surface substrate temperatures are about 10 degrees lower than the thermostats are reading. I do have both a cool side and warm side UTH. I've adjusted it so I'm getting surface readings of maximum 90 in the hottest spot and about 80 on the cool side. I'm a little nervous about the difference between the thermostat and the surface temps but I'll put less substrate in next time as see if that helps. I also turned down the lamp temperature to low 80s and that's about where my ambient temperatures seem to be now. My humidity is not as good today so I'm gonna give him some extra moss when he gets here as suggested, and I may move the water bowl closer to the lamp if it becomes a problem. Thanks again for all your advice. I'm sure I will be back with questions.