[Troy F]

Mason, J&L's have a box of rock that could be used for base. It is from Caribsea I think and is basically just mined limestone. Pretty cheap I think.

You could also have a look at Scott's set up, I think there are pictures on his website that show how he set it up. It is basically just a PVC framework that the rock sits on and is covered with sand. Scott's doubles as a spray bar to get some circulation low, not sure how that is working out but as a framework it would probably do what you are looking for.