I have an exo-terra that i was gonna use for the neo im geting. through reading about 15-20 husbandries i decided just to make a tub for it(big enviroments can stress them out)but if u decide to use the exo iv read that by placing a plastic peice of sheet over a portion of the top of the screen top and playing with the open/closing airholes towards the bottom u can hold humidity. but if i were u i would just make a tub its cheap and easier to maintain. Greg Maxwell has a good tub desighn on his web page. gl with your neo tho