I don't want to start a firestorm, its a beautiful tank. From what I see it is a bunch of colonies assembled. There is no way someone can get all that growth in 2 years (from club size frags). That tank has a look of about 4-5 year tank. So I would conclude he bought very colorful colonies. I wouldn't acribe the full wonder and beauty of that tank to a chemical additive. With that said, I don't wish to knock his form of reefkeeping there are many ways to do it. Sure looks better than my tank.
