WinterPill's all-in-one formula makes winterizing your pool faster and easier than ever! WinterPill clarifies the pool water and helps reduce scaling and staining. WinterPill is enzyme enhanced and controls non-living organics to control waterline ring and enhance filter performance. Winter Pill's patented pre-measured release delivery system effectively helps maintain clear water during the off season. WinterPill's concentrated formula can be used will all sanitizers, is compatible with all pool surfaces and will not affect pool chemistry .