When iron levels hit 5 to 10 parts per million, it’s time for an oxidizing filter (often using media like Birm or Greensand). This machine forces the iron to “rust” on purpose, then catches the particles in a filter bed. It’s like trapping a villain by making him slip on a banana peel you planted. Surprisingly effective, and it doesn’t require salt.
One catch: these filters need a certain pH level to work (usually above 6.8). If your water is too acidic, your filter is just an overpriced paperweight. Test your pH first, or you’ll end up with a machine that sighs dramatically every time you turn on the tap. Also, you’ll need to backwash it—think of it as the filter’s angry Tuesday morning routine.
What Takes Iron Out Of Water at Richard Jett blog
