I would just rinse the live rock off in a bucket of saltwater before I put it in the tank, if you had it shipped to you. (if you picked it up at the LFS, you shouldn't have much of problem) You won't belive how much junk comes off in the rinse. That should help your water not cloud up as much. I started curing a bach for my tank today and I litteraly had a half inch of debris in the bottom of the bucket from rinsing it.