i have a aft, i have a problem keeping the humidity up near 50%, most of the time it hovers around 30%, i have been spraying it down a bit 3 times a day to keep it up, is this normal? what can i do to keep the humidity up. i have a 10 gallon (for now) 75 watt ir bulb on the hot side (peat moss) 84-86 degrees with a heat strip on the same side (4 watt), on the cool side is a piece of slate, it is around the mid 70's during the day. i have covered most of the top of the aquarium with a towel to try and keep the heat up. it is winter here and the air is dry, and friggin cold. what can i do if anything. would it be safe to coverhalf of the top screen with plexiglass or something until summer?