I just set up my new 65 gallon salt tank a week ago. I got the water and temp just right, then added 40 lbs of the most beautiful live rock I have ever seen for sale. This stuff has polyps, corals, feather dusters, clams, etc, etc, etc... and the color is DEEP PURPLE!!! It is gorgeous stuff... I did checks on the Ph, Ammonia, Nitrate, and Nitrite(both low and High range) and everything is perfect... For now. The guy at my local pet shop told me that everything was going to die because the tank has not matured yet. Is this true, or is he just mad that I got the rock from someone else??? Also, should I start "feeding" my live rock and all of it's critters before the tank "cycles"??? I don't want to lose any of this rock.