10 years after installing a fiberglass pool I'm starting to experience a staining problem. I'm refilling from a well and based on what I've learned from this forum the stain is probably metallic so I tested to prove they can be easily lifted/dissolved using acid. I've ordered Ascorbic acid and a sequestering agent but understand the stain removal process still leaves the metal suspended in the water with the potential to create additional stains. I am wondering if anyone has successfully removed dissolved metals by passing pool water through a resin bed similar to a water softener? I happen to have one I'm not using and If I understand correctly the resin beads remove iron and other minerals via. an ion exchange process because the metal is a positive ion and the resin is negative ion or vice versa.

Would anyone know what affect the presence of other chemicals in pool water such as chlorine and stabilizer might have on this process? I'm most concerned about the impact a sequestering agent might have on the ability of the resin beads to capture the dissolved iron and other metals? Does a sequestering agent work via. a positive / negative ion attraction principal?

I've read about and have seen the small metal removal packets at the pool store......but I'm skeptical............and I would enjoy tinkering around to see if I can lower my dissolved iron using water softener resin. If this is a waste of time don't be afraid to say so !!!!

FYI: 16 x 44 Fiberglass in ground, 8 foot to 3 foot deep transition.......20K+ Gallons ??????? Jaccuzzi Magnum pump and Jaccuzzi sand filter........10 years of clear water, minimal problems and family fun. My hot tub requires far more attention than my pool!

Thanks for a really informative and helpful website!