I need to get a new fan. The fan I have doubles as a space heater and I am afraid to leave it on when I am not there. 54% is great for a ball but I have Kenyans and a rubber boa in that rack. I would love for it stay between 40 low and 50% high.

Subzero, I didn't mean to hijack your thread. Basically, you should just experiment with the number of holes. You do not need very many holes for the snake to breath. Its just a matter of controlling the enviroment inside the tub.