id really like to get a glass tank for my future ball rather than buy a plastic cage or make one, just seems a lot easier. i live in houston so ambient humidity is really not an issue around here. but, im concerned about the tank holding heat and humidity well. i was thinking of doing a fake expanding foam/quickcrete background in a glass tank to make it look more appealing to the eye and i hoped it would help insulate the tank some also. ive read that screen tops are what really affect the tanks ability to hold heat/humidity though. i was wondering if anyone has ever made/bought a top for a snake tank other than screen tops to help with heat and humidity issues?