Here's a couple things to look at:

If you want to use a tub:
http://ball-pythons.net/forums/showt...e-Basics-*DUW*

If you want to use a tank:
http://ball-pythons.net/forums/showt...p-w-pics-*DUW*

How to cover the screen top to retain humidity:
http://ball-pythons.net/forums/showt...tment-Tutorial