I have to compliment you Ram Puppy for your excellent preparation to do such a thing and for having the discipline to wait some more. That will pay off big time in the long run for you and your reefing. One comment on the refugium: You didn't specidy a plenum substrate size. If you start out with about 6 to 7 inches deep of course aragonite substrate and don't plug it off with a fine sand, and then the rubble on top, very well oxygenated water circulating across the top of the rubble, you'll have a great refugium. A pair of maroons in a 30 hex will own the tank. They will defend about that much area as their home nesting site from all comers. Almost all other fish in that sized tank with a pair will meet with rapid demise. It would work out fine in a 200 though as thats plenty of space for the maroons and other fish too.