I think there is something to that seeing thing. When my fertilizer finally took hold after the 3rd application my visibility went down to about 10 inches and maybe even less for a few days. I had started a feeding program and fewer fish began showing up until they almost stopped. After the rains we had a week or so back, my visibility is back around 2.5 feet and fish began hitting the food immediately after that. I've still got my time release floating bucket of southern excellence recommended by PondBoss in there but so far with no rain for the past 9 days, no bloom has returned. I do have very slight red particle like film in spots on the pond now. And in places it looks like dirty soap bubbles. Not sure that that is myself. But the fish are still eating the feed good with such high visibility.

John