The Claris Hardness Removal Filtration System is a 5-step softening and filtering system that ensures that chlorine, organics, and unpleasant tastes and odors are reduced efficiently, and that the equipment is protected from scale deposits. Pre-filtration media at the entrance to the cartridge retains coarse particles such as dirt and sediment. Then, the ion-selective filter medium reduces the levels of carbonate hardness while retaining all other minerals to ensure a precise and consistent adjustment of carbonate hardness. Behind the carbonate hardness adjustment process, a fine filter compresses the filter bed and retains fine particles. All of the water passing through the Claris filter system flows through a final 5 micron particle filter membrane. Finally, there is a highly efficient activated carbon absorption media at the filter outlet.