Morton Clean and Protect Plus Rust Defense removes 15 times more iron than plain salt for better tasting water, fewer rust stains in bathrooms and kitchens, brighter laundry, the prevention of hard water spots on dishes, faucets and tile, and longer-lasting appliances. Also promotes softer feeling skin and hair. It is recommended that every other month, add between two and four new bags to the tank, depending on the number of people in the household. Features easy-to-pour bag which includes a sturdy plastic handle for more comfortable carrying and an easy-tear opening. For use in all water softeners.