Similar to the GAC-10 filter, the TS-GAC will not only remove Chlorine taste & odour but will also help with Scale reduction. The addition of FDA grade phosphate crystals reduces scale deposits and rust stains to protect fittings and appliances The Pentair Pentek TS-GAC Cartridge contains granular activated carbon to effectively reduce unwanted taste and odor, and chlorine taste & odor, as well as phosphate crystals to reduce rust stains and scale deposits. Will fit Pentek style housings and 3 and 4 stage RO systems.