hi, i am supposed to be getting myself a beautiful new frilled this coming sunday, hes only about 5 inches right now, i plan to build a custom cage when he gets a little bigger but ive been reading that it would be best to keep him in something smaller due to his size so he doesnt get lost in such a large space. my questions are, what would be a good size tank/cage to house a youngin that small and i know it all depends on how fast he grows but roughly how long until he will need a bigger cage, appreciate any help