Feed the fish not the corals has always worked well for me.Ok, so I have been researching your post and I think you may be on to something here. I have 10 fish and do heavy in heavy out typically so I keep a good amount of nutrients in the water. I was dosing AB plus twice a week and benepets once a week so amino acids going into the tank 3x per week. Internet search shows that over dosing amino may brown up some SPS which is probably why I'm seeing a little color fade here and there. I think I'm going to cut way back for a month and just rely on fish fertilizer and see what happens with the color.