I have a large Leather Toadstool, Finger Coral, Frogspawn, Bubble Coral, Green Stars, Daisy Coral, Pearl Coral, assortment of Mushrooms and Polyups. The breakout is bad! I think it started with a Urchin I had a while ago that ate parts of my largest rock down to to white. The hair has been thriving in all those areas to where its spread to most of the top of the rock. Would cutting the lights down to a couple hours be ok for the coral that I have? and would tiny Zebra hermits work? The rock is just to huge and the main part of my tank to take out and scrub or bleach. I'm thinking about going back to the Urchine to try to mow this down some, is'nt that ironic.