Our featured 2nd stage filter FM15B is specially designed for iron manganese removal reducing iron Max 30 ppm down to 001 ppm and manganese Max 10 ppm down to 001 ppm Using high quality coconut shell carbon and highly compact fabrication tech 1ststage CTO filterFC15B knocks out cloudiness as well as bad tastes and odors removes over 90 of chlorine and is highly effective on VOCs like herbicides and industrial solvents iSpring WGB21BM is the system you need to protect your family and household appliance from iron manganese and more