I fought the good fight with GHA and won. I also discovered I was bottomed out with Nitrate and Phosphate. I'm dosing Phosphate and Nitrate now so I can hold .05ppm Phosphate and 3ppm Nitrate. It was amazing to see my coral perk right up. Anyway that's another thread for another day. Now I have the dark green/brown algae growing on the glass. I need to be scraped with a razor blade every three days or so. I do run a UV. I don't think I can get any picture of it. Has anybody run into this?