I will be housing him in the 20g high since he'll fit perfectly in there and he'll have some stuff to climb on since he likes to move around a lot. The heat lamp is for the night time because it gets about 60F in the room he is in sometimes. What's best to use as substrate? Like I said, I'm using aspen right now. I could switch over to cypress if that works, but I do have some extra aspen bedding I can use if aspen does just fine. As he gets larger I will be switching him over to a tub, and when he gets to maximum size I'll probably try to build an enclosure for him.