 Re: Live Rock
There are certain live rock vendors on the Internet that sell rock that is particularly rich in all kinds of sponges, and even nice corals like zoanthids. *I know that a lot of people rave about, for example, Tampa Bay for the critters that they find on the rock they get from them. *You'd have to do a search to find the vendors that sell rock that are heavy with these kinds of things. I bought locally and I'm happy with what I got, although I probably did spend too much compared to what it would have cost over the Internet.
I'd look for some big pieces of rock for the foundation, which you want to be stable. *Stability of the rock is important so be conscious of how you stack it up when you do. After you put some rock on top of other rock, press down from different angles so that you are confident that it won't tumble down after you're all done.
You have to decide also, whether you want the rock to lean up against the back wall and or the sides of the tank or you want an area around the rock on all sides. * | 
