My little pond is about 1000gal. As long as I clean the filters in the Savio skimmer every day, the water is clear. As soon as I cut the pump off, it gets cloudy. The stuff in the filters is brownish green. I've tried three different algaecides, ClarityMax, ClearMax+ and MuckOff (I wonder if that's a double entendre). Anyway, nothing helps. I wonder about a flocculant.