Having humidity problems? Need a way to hold in humidity in a Glass Aquarium? Try Glad Press'n Seal (Exact name). This stuff is some of the greatest stuff to come along since the wheel. Simply find amount needed tear off place over top of tank and press edges down and cut off excess with a razor or knife and use scotch tape or eletrical tape to hold in place. Here is a pic to show the outcome I've been using this stuff a while now and have had nothing but great results. If you notice in the pic toward the bottom of the tank you will see moisture and that is exactly what was wanted. Also you can use it and allow your tanks to dry out a little more the BP is in shed right now so his humidity is raised some.