I got a baby frilled a couple of months ago. I know that as an adult he will need a large cage and actually have a 2x4x4 foot cage picked out. Right now he is in a 36Lx15Dx18H tank with sticks to climb on. He is a very active little guy but has lots of running space in this cage. At what size should he be moved to a large enclosure. Will he need and intermediate sized home or when the time comes can he just move into his adult home?