I am in the process of constructing a couple of 12 x 12 x 18 Exo-Terra tanks for Dendrobates imitator and D. lamasi. Usually I "seed' the background foam with epiphytes before installing in the tank (and subsequent construction of the false bottom/substrate) but am considering also covering the two side panels using cork (such as Zoo Med Forest tile siliconed to affix) into which I will also seed mosses, etc. Does anyone have any advice on the pros/cons of creating a three-sided enclosure as opposed to the more common backside only?