My tank's temp stays pretty much at 70-72 degrees. But the humidity varies from about as low as 60% to about as high as 75%. I can keep the humidity levels higher(about 80%) but it involves wrapping the top of the tank with saran wrap with about a 3" air gap in the middle. But when I did this I had a bad problem with mold/fungus so I took the saran off. So my question is, is it ok for the humidity to vary between those levels without hurting the AGB's?