Like others have said, a shed hide helps really well. Make sure the container is a solid color-not a clear one. They won't use a clear one. Also, Aspen I've heard is great- but for me was terrible. Doesn't hold moisture at all. Maybe it's better for tubs, I don't know. I only have a glass tank at the moment. I switched to Eco Earth and Cyprus Mulch and have been more or less satisfied with it. Heat transfers through it well, the eco earth holds moisture very well. I mist 2-3x a day and humidity is always between 55-85%.