Iron removal media

DMI-65

Silica sand based catalytic water filtration media that utilizes oxidation, absorption & filtration process to remove impurities.

Katalox

Katalox Light is lighter than the other media, weighing in at sixty-six (66) pounds a cubic foot. It works in a pH range of 5.8 to 10 .5 and has a lifespan of 7 to 10 years. While the manufacturer rates their media at a much higher ability to remove iron, we limit it to 15 ppm of iron.

Birm or greensand

Another common method uses an oxidizing filter media known as "greensand." A bed of greensand is comprised of manganese oxide coated resin pellets or beads which provides both an oxidizing environment and filtering capacity. Oxygen is released from the manganese oxide coating to oxidize the dissolved iron in the raw water passing through the bed. The oxidized iron particles are trapped in the resin bed until removed during the backwash cycle when the manganese oxide coating is regenerated with chlorine or potassium permanganate.
The iron particles must be flushed out during the backwash cycle so that the resin bed does not become clogged. Greensand systems do not require high dissolved oxygen content but work best when the water pH is above 7.5. These systems are popular when a large volume of water is needed and the iron is not over ten to twelve ppm.