If you're thinking of a tank, look at reptile cages instead. One of these: http://www.reptilebasics.com/2x3-Cag...h-p-16286.html is perfect for a ball forever. I have these cages (a bunch of them) to put my females in (I have racks for males and young ones). They are great cages and keep stable temps and humidity. Check 'em out!