I know it's near blasphemy to utilize a pool store but whe I got inpatient about cloudy water this year (mesh cover dirt, lotta.dead algae) I made sure algae was dead, got all chemicals in limits and used below as directed. By next moning all had dropped to bottom and I vacuumed it to waste and I'm ready to go. No pool store jockey sold it to me, I just took a shot with it: http://www.shoplitehouse.com/store/p...larifer-Quart/