I currently have my smallish youngish male ball in a 29 critter tank. He is a little bit longer than the tank, most of the time this doesnt seem to bother him. He spends most of the time that I see hiding in his tree stump. He loves it, poking his head out to watch me. But there are the times when he "stretches his legs" that I feel the tank is to small for him. But the tank is ok for him?