Aaron
Thanks for the info. I have read that post like 10 times. It's very informative. I actually based my set up on that article and I'm in the process of getting a heat lamp.
The substrate is around 1/2". I actually took soom out so that it was a little thinner. But I was nervous about setting the thermostat to 98 degrees. I don't want to burn him. I have a temp probe on the edge of the hot side under the water bowl, it's reading between 80-82 degrees.
When he gets bigger and needs to move into a bigger cage I will probably get a PVC one. I think if I remember correctly you did a nice write up on PVC cages.
Thanks everyone for the advise. I can't believe how much my daughter and I are addicted to this ball python. We absolutely love him and want to make his home comfortable.