The humidity isn't an issue, its always nice and moist in there, I have a fogger running. I did purchase him at this weight though and so far I've been told white lipped tree frogs aren't suppose to be very fat, more skinny. I still feel uneasy about him though, he wont eat in front of me, but he is eating because when I check the next morning all the crickets are gone maybe 2 are left out of 9 or 10 (small). he's active (at night) an seems to not show any health concerns. When I originally did my homework it was for a white's tree frog, which I went and purchased yesterday, and for the simple reason White lipped tree frogs like companions. I love him too much already to return him (30 day policy). Any suggestions on how I can get his weight up and maybe getting him to eat more? or at least in front of me?