ResinTech SIR-1300 is a premium grade resin media having catalytic property to remove dissolved iron, manganese and hydrogen sulfide from ground water. SIR-1300 having catalytic property, oxidizes dissolved ferrous iron (Fe2+) to insoluble ferric iron (Fe3+). Similarly soluble Mn2+ will be converted to insoluble Mn3+. H2S is reduced to yellow sulfur particulate. The resulting insoluble iron, insoluble Mn and sulfur particulate thus formed gets trapped in the bed and is effectively filtered. The accumulated iron particles can be removed with simple backwash from the resin bed.