AquaPill™ WinterPill® 90222APL High Concentrate Winterizer for up to 30K gal Pools - 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. One WinterPill®​ treats up to 30,000 gallons of water. It is enzyme enhanced and controls non-living organics to control waterline ring and enhance filter performance. WinterPill®'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.