In addition to hard water, many homeowners struggle with iron in their water supply. Iron can be found in city water supplies and in private wells. Rust stains, where there has been water, are a good indication that you have iron in your water supply. Iron Fighter water softener salt pellets are specially formulated for water with high iron content. These 99.7% typical pure water softener salt pellets help prevent rust stains on laundry, fixtures, sinks and tubs. Virtually 100% water soluble, it also minimizes mushing, bridging and rust build-up in your water softener brine tank helping to keep your water softener running smoothly. Our patented two-handled, 40 and 50 lb bags make lifting and carrying easier than ever. Recommended for most types of water softeners, particularly in regions of high-iron water content.Formulated for use where iron content in water is highPremium purity 99.7% typical pure saltAn FDA-approved additive helps prevent rust stains on laundry, fixtures, sinks and tubsVirtually 100% water solubleMinimizes mushing, bridging and rust build up in your brine tankPatented two-handle bags make lifting and carrying easy