Heres the pics of my HA problem. These where taken just before I added my scrubber. I had tried EVERYTHING nothing helped. I paid a small fortune for a skimmer that I was told would surely take care of the problem. The HA laughed and kept on growing. My lights where down to 3 hours a day, my fish where only fed a small amount every two to three days, I was doing 10% water changes twice a week. And keep in mind those picks are only about 3 days growth, I would remove about 80% of the HA during my water changes.