thanks for the input. definitely agree with putting the acu-rite in the tank, going to right now actually. about the cardboard, i change the cardboard hides pretty frequently due to the same reasons, easily soiled, that mite problem, and just making sure she's loving them. they seem pretty good sized for her, she's about 4 feet and the i made sure the entrance was even snug going in for the least light and most secure it could feel. anyone and everyone, thanks and keep giving me feedback. later.