The Purest Filtration Start making better tasting food, ice, coffee, and drinks with your reverse osmosis system. Make crystal clear ice without the contaminant clouds of unfiltered ice. With this replacement filter, extend the life of your water using appliances and keep contaminants out of them. Deionization stops water contaminants from building up overtime. With tap water you may need to replace appliances early or bacteria can start growing inside them. When creating habitats for aquatic life it's important to start with the purest water possible through a replacement deionization filter. Whether you're adding salts for reef tanks or specific trace minerals for freshwater fish, you need to be sure you're creating the ideal environment, free of chlorine, iron, pesticides, and Lead. Stop Drinking Contaminants This replacement filter removes up to 99.99% of over 142 contaminants in tap water Total Dissolved Solids (TDS), Pesticides, Herbicides, Lead, Chlorine, Fluoride, Radium, Bacteria, Arsenic, Cadmium, Pharmaceuticals, Chromium, Fluoride, Bacteria, Pesticides, Giardia, Heavy Metals, Viruses, Rust, Sand, Dirt, Dust, Cyanide, and more Quality Defined Deionization RO system filters create some of the purest water possible. Deionization filters dramatically increase removal of the hardest to catch contaminants through ion exchange. It attracts the cation and anions of contaminants, leaving you with pure water.