Lots of debate over whether or not softeners affect sewage disposal fields. May be just the extra water involved overloads the system. I would rent from a water conditioning company a iron removal tank(s). Saves you the trouble of messing with KMnO4, which stains everthing a bright purple. Won't soften,but then you didn't mention hardness as a problem.

Those who would disrespect our flag have never been handed a folded one.

Men never do evil so completely and cheerfully as when they do it from religious conviction.

When in the Course of human events......