Ha, ha. Yes it will be a bunch of rock. I am going to use a mix of different kinds of rock, because I really need several large shelf pieces on one part of the tanks and then more of the boulder -type on the other. I think it'll probably be around 1200 pounds, I already have some in my 200 that I'll be using.
The original plan was to have a reef on one side and a fish only on the other, but...you know how that always goes, if you got a tank sitting around, it will eventually become a reef. So the plan is now to separate all the acros and clams together and then everybody else goes in to the other tank. Really my husband wanted a predator tank, and I said "Oh sure honey that would be great, let's get TWO tanks. One for your predators and one for the reef." Well, . . . . . I really did think of that for a while.....but the only predator in the tanks now will be a lone lionfish. Well,......I didn't exactly LIE (on purpose).....