The CRYSTAL QUEST Whole House Multi/Iron, Hydrogen Sulfide 1.5 Water Filter System uses media formulated from glauconite greensand. This media effectively removes iron, manganese and hydrogen sulfide (rotten egg odor) usually found in water. The system is installed in the main water line. When the raw water enters the iron filter, it passes down through the filter media and gets oxygenated. The oxygen causes precipitation of the minerals and any iron, manganese or hydrogen sulfide present in your water supply is trapped, resulting in a clean filtered water flow to your household. The filter media is periodically regenerated automatically, backwashing the trapped minerals into the drain and regenerated by replacing the oxygen. This is done by introducing potassium permanganate into the media. The system comes with the a potassium permanganate container. All Whole House Iron, Hydrogen Sulfide Water Filters include the following: 10 year Warranty on resin tank and brine tank assembly, 30 Day Money Back Guarantee, 5 year warranty on all Computer Monitored control valves, Low voltage transformer, and a bypass valve. It travels through 7 stages of filtration. In Stage 1, water flows through a 20-inch sediment filter cartridge that removes sediment, silt, sand dirt. It also extends the life of water softeners, water filters, and prevents damage to control valves or pumps. Next, water flows through an iron and hydrogen sulfide-removing media mineral tank, which efficiently removes iron and hydrogen sulfide. In stages 3, 4, and 5, water flows through a KDF-85, KDF-55, and GAC mineral tank which removes hundreds of contaminants. Then in stage 6, water flows through ion exchange resins and brine water conditioner. Finally, in the seventh stage, water flows through a 20-inch solid carbon cartridge for removing volatile organic carbon compounds (VOCs), insecticides, pesticides and industrial solvents. CRYSTAL QUEST Whole House Multi/Iron, Hydrogen Sulfide 1.5 Water Filter System also features: Solid 316-Stainless Steel Tanks: heavy-duty, burst-proof construction that is made to have a high capacity of REDOX and GAC with a brine mineral water conditioner and with Iron and hydrogen sulfide-reducing media, Riser style 1-inch internal flow distributor, a solid state microprocessor with LED display Electronics control valve, Chrome sleeve/jacket--Polyester fiberglass tank and a Stainless Steel Bypass Valve.