We are picking up a 7mo old today and it comes with a 20 gallon tank to stay in temporarily. We have a 150 gallon empty at he moment from a red ear slider. I was thinking of converting it into a desert habitat minus the sand, of course. The setup already has several basking lamps(mega ray SB) and heat lamps. The plan was to build a foam habitat, grouted and turned fake rocks, rock cave, climbing areas, platforms, etc. Anyway, is this to big for a beardie or will it thrive?