Chemi-pure or chemi-clean? Which do I need? I had an explosion about 3 weeks ago. It killed all of my coral. I went dark for about a week and "killed off" all of the red that I saw. I blew off my walls and all of the rock, and removed all the debris that was visible (even moved all the rockwork). But now I see it coming back. Am I going to have to buy new live rock? And if I do, will my tank be able to support my aquatic life? It's a 76 gal tank, with only 6 fish at the moment.