Liquid Sanitizer Concentrate ( 0.5 ounces ) for sanitizing Water SoftenersCleans and Restores Your SystemINSTRUCTIONS FOR USE - Water Softener Application:
Mix the 1/2 oz. Packet of Sani-System with 4 gallons of water and then pour into salt tank. Manually regenerate the softener. Double the dosage for heavily fouled units.
Here are some videos produced by the manufacturer,https://youtu.be/3t3vt8jgZ3E