I got the feeling from Mike that the pros from biodiversity..brittle stars, sponges, bristle worms etc out way potential negatives even if you plan to wait out for the system to stabilize using dry rock. I guess I should consider myself lucky that so far my only pests that I worry about are a few aiptasias and a small patch of colonial hydroids that I keep zapping with my laser. The worms, brittle stars and sponges all seem to add life to the reef. I’m not sure if they would have shown up if I would have just let the tank cure by itself. On the flip side, I couldn’t say if they help keep the coral healthy or not though. Dry rock sure would have been a lot cheaper!