I'd suggust that until your rack arrives, you might want to have him on newspaper (i kept mine on smaller peices, ie 1/4 of a page, so I just had to remove a small part and not the entire substrate, less movement of things, less notice the snakes paid to me), so you can quickly spot clean and not have to dig around his tank. That part could be stressing him out, as you're messing up him place.