I have been battling green algea in my 40 gal reef since I set it up 9 months ago. The red slime went away, and I am left with green algea covering everything, it took over my polyps and my bubble coral which haven't opened up in over a month. I had a fluval filter and an over the side skimmer at first. I am detecting no phosphates or nitrates, and my LFS suggested I remove the fluval and the substrate and increase the air and water flow through the skimmer which I did.(haven't got all the substrate yet) I also took all the live rock out and gently removed the algea in a tub of tank water. The tank looked great for a week, and I am back to a big fat hairy green mess. The only happy creatures are my green brain and 2 cleaner shrimp. Any suggestions besides opening the back door and tossing it? Also, how do I know when to give up on the bubble and polyp? Maybe they're dead and feeding the algea?