Thanks. I've already learned a fair bit. When I got the little guy, I believed I had at least the basics covered, but I had no idea about those stupid rocks. Wow.

I have a UTH that covers just above a third of the tank's underside, but it doesn't feel like it gets very warm. It doesn't feel like there's much of a difference in the aspen bedding when I touch the warm end, as opposed to the cool end.