Yesterday, I was at my LFS and they had just received a load of live rock. There was a huge hunk that I was drooling over. It was covered in pretty polyps and coraline algae. I wanted that rock!!!! My lights aren't up to snuff for corals and I only just got everything set up so Im glad I resisted the urge!!! Over the next few months, I want to get my lights right and fill my tank with live rock before I bring any corals or fishes home. I want to be a responsible aquarium person and I've been reading online about different types of live rock. Does the cultured stuff do the same job as the real stuff? Does it matter? Do they really take these live rocks from existing reefs in the waters? How do you know which is best? thanks, catherine