BioGuard Silk Smart Sticks allow pool owners to sanitize their pool water simply by adding these slow-dissolving sticks into their skimmer. As they dissolve, they effectively kill bacteria and control algae to keep your pool healthy, while its SunShield technology prevents it from breaking down due to sun exposure. Its SilkGuard formula eliminates dissolved metals which can cause staining, scale, and corrosion, resulting in water that is softer and has a more natural quality. Best of all, Silk Smart Sticks dissolve at a slower rate when your pump is off to last much longer than any other sanitizing sticks. Silk Smart Sticks drastically reduce your pool's need for other chemical treatments, saving you considerable money while giving you outstanding water quality with a velvety feel that other sanitizers simply cannot match.