Ok, so I bought some live rock from a friend when I started my tank and its not growing anything except green hair algae. .. None of my other rocks have hair algae and my other rocks have coraline algae growing on them. But these other rocks don't. They are bare except for the hair algae. What is the deal with them? Should I take them out and replace them with some nice rock? I think they may be contributing to my somewhat high phosphates. ... Any thoughts, suggestions?


