The Nature2 W20080 Express cartridge allows pool owners to bring all the benefits of mineral technology to their existing pool. During the regular pool filtration cycle, water flows through the Nature2 W20080 Express cartridge, where a combination of silver and copper minerals destroy bacteria. This process significantly reduces the need for large amounts of chlorine, limiting the potential for eye irritation and unpleasant odors. <br /> <br /> <ul> <br /> <li>For In-Ground Swimming Pools</li> <br /> <li>Easy to replace cartridge</li> <br /> <li>Cartridge lasts 6 months</li> <br /> </ul> - Nature2 W20080 Express Inground Swimming Pool Mineral Purifier <br /> - For Inground Swimming Pools <br /> - Reduces eye and skin irritation <br /> - Easy to replace cartridge <br /> - Destroys bacteria <br /> - Capacity: 5,000 - 25,000 Gallons Pools <br /> - Cartridge lasts 6 months <br /> - Run Time: 6 Hours a day minimum <br /> - Cleaner, clearer, softer water with less chlorine <br /> - Better for the Environment <br /> - Part Number: W20080 <br /> - Product Condition: BRAND <br /> - 1 Year Manufacturer Warranty