Originally Posted by peachii
We are going to be doing it on the new 40 gallon we are getting next week. It won't be an immediate set up as we need a stand, decide on the slate we want to use and then let it dry and cure for a few weeks. Stone really wants the slate rock wall, filled in with moss look. We aren't going to use styrofoam, rather will use silicone sealant and then jam moss between the cracks and let it grow in to look natural. I'm excited about the moss look, wasn't so excited about the styrofoam/slate because seems you would lose to many inches out of the back of the tank. It's all about plant space for me :P
Ooh, I've seen a video from a guy who did decorations/walls in slate, and they were beautiful. :) I worry about the weight though, and, like you, I want to make sure that the back wall is as thin as possible.
For this one I've just done layers that are a max of 2 inches thick, and that's just for overhangs/caves, the rest of it is about 3/4 or 1 inch thick...which leaves a better amount of space in the tank. :)
I can't wait to see pictures of your slate wall! I'm sure you guys will make it look *amazing*. :)