We have tried everything we have thought of, been advised of and read about but there is still tons of this super fine particles that even go through t-shirt fabric and even muslin fabric. On top of that, every morning there are about 1000 new frog eggs in the pool. I am now beginning to wonder if all that fine stuff is frog door doo? When we used a product called sink & sweep the pool was sparkling clear other than these clusters of goo on the bottom. But the vacuum just stirs it back up instead of sucking it up???? Truly at my wits end with the whole thing and about to forget having a pool this year.....