This system is designed to be a stand alone filter for immediate removal of chlorine and sediment from your water. It is rated at up to 99% chlorine removal and can clean up to 90% of the sediment particles above 5 microns. Having chlorine and sediment free water is essential to growing healthy plants and maintaining beneficial microorganisms, bacteria and fungi in your root zone and growing media. These microbes cannot survive in the presence of chlorine. Chlorine free water is also essential for organic fruits and vegetables, hydroponics and any bioorganic gardening method in general. This filter is not designed to lower the Parts Per Million (PPM) of your water. The majority of the PPM are minerals which can only be removed with Reverse Osmosis systems.