BioGuard Polysheen Blue Clarifier - Quart by BioGuard BioGuard Polysheen Blue - 1 Quart Highly concentrated to clear cloudy water No diluting required - 1 oz per 5,000 gallons of swimming pool water Binds together small suspended particles so they can be easily removed by your filter Item will ship USPS Priority Mail if ordered individually or 2 pack and will ship day of order if not next day.