Hi, I was at my lfs looking dreamily at live rock and noticed their are two kinds of live rock, one taken directly from the reef, and also a man made version that is left for 9 months in the sea to seed, it costs less has less diversity of life growing on it but still contains a lot of sea life, whats others opinions on this ? it seems good to me, creates jobs, does not damage reefs and is a little cheaper ? would my tank be fine with this rock and maybe a few peices of true live rock to encourage more life, thank you