alright all you DIYers. This is what I want. Maybe someone can think up a way to do this. I want a way to mount some rock to the back of the tank kind of like those magnet frag racks, but with rock. The reason I am thinking magnets is because my tank already has water in it and I dont want to have to break anything down, but want to add more rock space so to attach corals. I have looked all over on line for somethiing like this and cant find anything.