I'm setting up a fifteen gallon high vivarium using coco-mats for the background (which I'm affixing to not just the back but the sides as well). I saw a twenty gallon high somewhere on this site with something I would like to try. They had affixed pieces of wood into the corner. My question is how to do this? if I just use silicone and attach the wood to the coco background will it hold? I'm worried that the coco will tear away after being exposed to high humidty and having the added weight of plants/dirt/frogs on top of the wood.