You should definitely look at getting into Eco Earth. It works great for balls because it retains humidity very very well . It also, to me, lasts longer and is not that bad priced. I get the bricks and do the soak method as you get ALOT for your money. Just my two cents. May be something you might want to look into.

I used to use aspen and fought humidity issues non stop. Now i only use aspen for my king snake. A breeder got me hooked on the Eco Earth and I haven't looked back since.