Well I all of a sudden developed the Hard Crusty Green Algae in my tank. Not sure why, but its there. Its the hard stuff to get rid of, scraping would be the only way, but its all over, behind the rocks and on some of the glass. I have also noticed that my torch coral is all of a sudden dying. Some of its tentacles are gone, and its not as big as it used to be. I haven't been to the LFS yet to test my water, but I'm sure something is off. Maybe nitrates? Any help would be great. Thanks