The new Sani-System Clean & Sanitizer Kit contains both Sani-System liquid sanitizer and Pro Res Care resin cleaning solution in handy single-use doses. Sani-System is the only EPA and NSF approved sanitizer for use in water softeners. It's proven to kill 99.9% of harmful bacteria without the use of chlorine, oxidizers or acids that can harm system equipment, parts and resin. Pro Res Care restores softener beads and control parts to peak efficiency and maintains the life of the unit. Old part #SANISYS-COMBO