Why wouldn't one of those green sand iron filters work.
They only work to 15ppm iron max. Even if this was not a problem his PH is out of range and would have to be neutralized first. And green sand requires KMNO4 (potassium permanganate - somewhat hazardous) along with a couple hundred gallons of water in order to regenerate.
Originally Posted by Bill Arden
Then again the system that's there probably just needs maintenance.
Maybe. I'd be more optimistic if it had a retention tank. That doesn't mean he can't use what is there as part of a new setup though.