The 3-Pack Cartridge Replacement package comes with one 6-process filter, one fluoride filter cartridge and the Alka-Pi alkaline filter to ensure your filtration system is running at optimal performance. While the 6 Process filter maintains the revitalization of the core focal points of your filtration system, replacing the fluoride and Alka-Pi filters simultaneously can enhance performance and water quality. While the fluoride filter works diligently to remove any excess traces that managed to make it through the 6 Process filter, the Alka-Pi filter balances the pH level in the remaining water supply before it's distributed through your tap for fresh, clean, alkaline water. This 3-pack replacement cartridge set can optimize the performance of any filtration system when maintained and updated properly and consistently. This package includes everything you need to replace the main attributes of the filtration system to ensure a consistent and clean water supply. These replacement cartridges work together to ensure that your water supply is filtered and ready for use and can handle up to 30, 000 gallons of water filtration before needing replacement.