At first he was living in a 40 gallon tank, but I recently got him a 120 gallon one. Beforehand, he kept trying to climb the walls of the tank but kept falling over and trying again. I figured if I got him a bigger one, he would have more room to run around. However, he just keeps doing the same thing over and over again and it's driving me crazy hearing all that noise when I'm trying to work or sleep. All the temperatures are correct and I let him out regularly. If this keeps up I might just go insane since I don't know what he wants.