RETF like my clown tree frogs are nocturnal so you will really only see them moving around at dusk and dawn unless you use a red light bulb to see them at night. I did a vertical conversion and only made a 6" screen at the top of the tank and my humidity stays around 75 at night and 68 during the day. Which is o.k. for Clowns and everything I have read states that Clowns and RETF need about the same conditions in the tank.