40 lb. system saver water softening pellet, contains resin cleaning additives which keeps the softener running better & longer, reduces iron build up, extends softener life with continuous use*, helps improve appliance & water heater efficiency, strong graphics & product detail, endorsed by many leading softener brands, only water softening salt to earn the good housekeeping seal, eliminates messy tank clean up. *Based on external laboratory testing of continuous use of System Saver II versus plain salt over the life of the softener using hard water with an average clear water iron content of 1.1 parts per million.