9Keep your pool crystal clear with BioGuard Polysheen Blue Clarifier. This 1 quart bottle is sold in a convenient 6 pack for long-lasting effectiveness. It's perfect for those who value cleanliness and want to maintain a visually appealing pool. Use this clarifier in conjunction with other pool chemicals and testing kits for optimal results. Invest in BioGuard Polysheen Blue Clarifier today and take the first step towards a sparkling pool.