Over time, water softeners can become contaminated with rust, mineral build-up and other impurities that reduce the water softening efficiency of the machine. This can result in toilet, sink and tub stains, dingy laundry, wear and tear on your appliances, wasted salt and other water challenges. Water Softener Cleanser is specially formulated to easily clean and restore machine performance so you can enjoy the results of soft water again. Restores Softener Performance Water Softener Resin Cleaner - Removes harmful mineral build-up from resin bed, valve and system Keeps water softeners running stronger for longer Compatible with water softeners that take salt - Morton, Whirlpool, Aquasure, Rheem RHWSC Water Softener Cleaner and more Easy to Use Concentrate - 4 uses per bottle