BioGuard SilkGuard Complete Chlorine Pool Chemicals, 3.5 lbs

Multi-benefit 3-inch chlorinating tablets designed for effective pool sanitation Features SilkGuard Technology that softens water by binding to hard water components and metal surfaces Protects pool surfaces and equipment from scale, corrosion, and staining Contains SunShield Technology for enhanced protection against sunlight degradation Incorporates SmartGuard Technology for longer-lasting performance compared to traditional chlorine tabletsYou may also like BioGuard Balance Pak 100 (12 lb) (3 Pack).