Yup! Just used big bottle of CLR to take it off. It builds up in hot water tank....can't ever get it all out. Just sick looking when turn lights on and bathroom has red everywhere.Iron in solution cannot be simply filtered out. You need some sort of water softener. My well water is high in iron. I live with it. The toilet and sink/tub get stained now and then but it is easily removed with some type of cleaner the wife uses. I have a 3 micron inline filter installed but that is simply to prevent tiny pieces of stone from clogging the screens in the faucets and the washer. My well is 100 feet deep and drilled into slate starting at about 4 feet below the surface. I have two water lines from it. One comes into the house and the other simply acts as an overflow. If I plug the overflow off the water rises up out of the well casing and flows over the ground. I have so much water flow in the well that the slate keeps washing tiny pieces of stone out of all the cracks in the rock and it finds it's way into the plumbing hence the inline filter before distribution throughout the house.