Morton Salt Clean and Protect Plus Rust Defense remove excess iron . giving you better-tasting water and helping to reduce rust stains. For the many households that have hard water . it is a solution for softer water that provides many added benefits. When used . Morton Clean and Protect Plus Rust Defense is formulated to help prevent buildup in pipes and appliances . helping to extend their life and improve efficiency. In addition . makes dishes easier to clean and leaves hair and skin feeling softer after washing and bathing. To continue to see the benefits of Morton Water Softener Salt Pellets . it is recommended that every other month you add between two and four new bags to your tank . depending on the number of people in your household. In order to make carrying and pouring our 40 lb. bags easier . this bag features a sturdy plastic handle with an easy-tear opening.