This is my second attempt at a nano reef. Question: I ordered some live rock from LiveAquaria.com ( Select Lalao Rock) . The pieces I received were very pretty full of green, red, some blue and purple coralline. My order was for 30 lbs of this rock, which I did get - no rubble. One of the pieces to my surprise was a giant clam shell (about 15lbs on my scale) full of little fan worms, a few bristles, some red kelp, and a bunch of what looks like baby oysters. I broke the shell up into a couple of large pieces and out some of them into the tank. My question will the shells act as a natural buffer and help me keep my calcium, Ph and alkalinity in check. Also my water is still a little cloudy is this normal for a tank that is not a month old yet. I actually put the rock in the tank for a week then took them out and scrubbed all the dead matter off. I know it is not my water quality since I own a R/O filter. Any Suggestions?