The Poly Bio Marine Kold Ster-il System is an advanced three-canister water purification unit designed to provide exceptionally clean water for your saltwater aquarium. This robust system effectively removes a broad spectrum of contaminants from your tap water, ensuring a pristine environment crucial for the health and vitality of delicate reef inhabitants. By employing multiple filtration methods, it safeguards your aquarium from harmful impurities that can compromise water quality and stress your aquatic life. This Kold Ster-il system features 10-inch clear canisters with 3/4-inch NPT threaded fittings, capable of flowing at 3.8 gallons per minute for approximately 5,000 gallons of purified water. Its sophisticated filtration process targets and restricts lead, mercury, cadmium, copper, iron, zinc, volatile organic chemicals, tannins, proteins, dissolved organics, chlorine, pesticides, metal particulates, algae, fungus, Giardia, Cryptosporidium, and E. coli bacteria. The system utilizes three distinct filtration types: barrier restriction, adsorption, and absorption, and its media and apparatus have been rigorously tested under ASTM and EPA methods, meeting NSF International criteria for chemical sorbent media. Ideal for dedicated reef aquarists and those with sensitive marine ecosystems, the Poly Bio Marine Kold Ster-il System offers unparalleled water purification, minimizing the risk of introducing harmful substances into your aquarium. If you are concerned about the quality of your tap water or strive for the highest possible water purity to support thriving corals and fish, this comprehensive system provides peace of mind and a foundation for a successful reef tank. It's an essential investment for maintaining stable and healthy water parameters.