I actually had coral in the main the next day lol, But I will confess, I was very spoiled, and pretty naive actually with my ages old live rock in the past. I'd set up a system, and transfer a few pieces and it would be good to go. What I learned this past year lol, what many of you already know, is that when you start a system off with dry rock, it's true what they say, things are pretty rough at the beginning for a while before things really start to settle in and grow again. In my case, it's been a year now since i started filling the main, and i have finally really just rounded that corner recently. Stuff's looking really good and growing again like crazy, but it was a super slow and rocky (no pun intended) year in for the main. My back up system housed all my old rock and if not for that system id probably have lost lots of stuff this past year. if you are starting out with dry rocks, best advice is to go slow for sure. Give the system plenty of time to settle in and establish itself.