DMI-Plus is an extremely powerful catalytic water filtration media that is designed for the removal of iron and manganese in aqueous solutions water without the need for potassium permanganate or chemical regeneration. This media displays colour from dark brown to black, in which the colour is produced by Manganese Oxide in the outer layer of the granules. DMIPlus acts as an oxidation catalyst with immediate oxidation and filtration of the insoluble precipitates derived from this oxidation reaction.