Iron Fighter Water Softener Salt Pellets are Formulated for Water with High Iron Content. NSF logo for water 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 typical 99.6 Percent pure water softener salt pellets help prevent rust stains on laundry, fixtures, sinks and tubs. Virtually 100 Percent water soluble, it also minimizes mushing, bridging and rust buildup 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. Have a Water Softener Salt Question? Visit our Water Softener Salt FAQs page. Formulated for use where iron content in water is high Premium purity - typical 99.6 Percent pure salt An FDA-approved additive helps prevent rust stains on laundry, fixtures, sinks and tubs Virtually 100 Percent water soluble Minimizes mushing, bridging and rust build up in your brine tank Patented two-handle bags make lifting and carrying easy Recommended for most types of water softeners NSF Certified to NSF/ANSI/CAN 60