Katalox Light is a versitile medium for the treatment of iron, manganese and hydrogen sulfide. It's lighter than Filox, and requires significantly less backwash. It can also provide sediment filtration down to 3 microns, and can reduce arsenic, zinc, copper, radium and uranium. NSF & WQA certified.

Softener resin is a cation exchange medium consisting of polymer beads that “soften” water by replacing hardness minerals—calcium and magnesium—with sodium. It can also be used for low-level iron reduction, with pH requirements.

For increasing the pH of acidic water. Calcite dissolves as acidic water passes through and must be replaced as it dissolves. Unless it is used in an upflow filter, it must be backwashed.

Like Calcite, Corosex (granular magnesium oxide—also marketed as FloMag) is used to raise the pH of acidic waters. It supports higher flow rates and gives a greater increase in pH, but it tends to “cement” in hard water and when it is mixed at a ratio higher than 50% with calcite.

Zeolite is an excellent sediment filtration medium that backwashes much more easily than multimedia (sand, anthracite, etc) sediment filters. Filters down to less than 5 microns.

A very useful and efficient medium for the removal of suspended matter and particles. Can remove iron with proper oxidization.

Widely used for reduction of free chlorine and heavy metals. Adds life to carbon filters, serves as a mild bacteriostatic agent to retard bacteria growth in filter beds, and acts to prevent scale buildup. Extremely heavy (170 lbs. per square foot) and difficult to backwash.

Widely used for reduction of iron and hydrogen sulfide. Extremely heavy and difficult to backwash in large beds.