I know there are a million posts about iron staining - I’ve read them all! So we’ve been struggling with iron for the last few seasons. We’ve done partial drain and refills but we are on well water and don’t have much option other than using well water. We’ve done the ascorbic acid and run a polyfil filter. Here’s where we are at: last year, we were getting lots of iron caught in the polyfil. This season, our steps are staining after our fc level gets over 3, but we can’t get any more iron out it seems. Polyfil is still white after running for days. Our water doesn’t turn green, the iron is just present as a stain. Am I correct in thinking that the remaining iron is in a form that can’t be filtered out anymore? Do I need to drop my fc down, treat with ascorbic acid to lift the stains, then treat with a sequestrant to bind the iron - at which point the polyfil filter can catch it? Has anyone else had success with this?