Summit Brands IO30N Super Iron out 28 oz.
Since 1958 Super Iron Out has been the number one brand because it works better on rust stains than any other product. Super Iron Out chemically changes rust and iron into a clear, soluble state that easily rinses away without scrubbing. It does not contain harsh or abrasive chemicals and is safe a number of different surfaces. For all available applications and surfaces.
Keeps water softeners clean and operating at maximum efficiency.