Hmm, okay. Well what can I do to prevent wood from retaining moisture? How big of a problem will it be? I really want to try this because I have the materials and tools (ok, my dad does and I'm just going to take them) and it won't take much work to build. I really don't want to go buy a tank, and I don't have space for anything much longer than what I have. Thats why I figured that adding a new level would be the way to go for me.