Temps should def be no lower than 76-83 cool side... no higher than 88-95ish on the hot side... Humidity should always be above 50%... I keep mine at 60-70 all the time doesnt seem to bother them at all... I do know when you get down too low they get an RI. The cheapest way to get the humidity above 50% is get a tub... If you REALLY want I can tell you how to HELP get it up but its gonna cost you atleast 14$... 4$ more than a tub.