Whole house water filter that protect your family and household appliance from iron manganese and more Our 3rd stage iron water filter FM25B is specially designed for iron and manganese removal reducing iron MAX 30 ppm and manganese MAX 10 ppm The water filter lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process This also removes sediment chlorine rust herbicides industrial solvents and more