Thanks guys for all the help. Last night I lined the inside back with white paper. It made a HUGE difference. I guess I'm going to have to sacrifice looks for well being. All for the love of toads! I'm working on a 40 gal breeder tank for them so I think I'm going to line the sides and back half way up with cork. Since the humidity isn't real high for them I think this will be safe, still reading on this. I wish they were as easy to care for like the Cope's are.