All Purpose Liquid Softener Cleaner 1gal Active Ingredient Phosphoric Acid Cleaner Functions Restores the Softener Beads and Control Valve Parts to Peak Efficiency and Maintains the Life of the Unit Concentration Type Concentrated Container Size 1 gal Features Installs Inside or Outside of the Brine Tank Feeds Automatically For Use With Water Softeners Form Liquid Product Type Liquid Resin Cleaner Removes Calcium Series Res Care Standards NSF/ANSI 60