The tank is glass, most likely using plexi as a divider for the land area, unless there is a better option. There is gonna be only one 'land area' but there will be hills/slopes (im gonna use eggcrate to give the hills strength so it doesnt just collapse) that would get real messy if I allow the soil to become waterlogged. I would really like to avoid drilling the glass, because I have never done this and this aquarium is brand new. I was thinking about putting a layer of coarse gravel under my layers of dirt, and having a tube travel up the back glass going between the gravel layer and out the top the the tank to allow it to evaporate and/or be hooked up to a small pump.
how does that sound? in the meantime ill check out dendroboard like you suggested