Re: Help! - Dark Stains on Vinyl Liner and Plastic Fittings
You will need to put a sequestering agent in the water. Take your ph down to 7.2, put in the sequestering agent and let the water filter 24/7. If the stains don't lighten, then you will have to use an ascorbic acid stain treatment. Read through the metal forum, and it should explain more for you. If you have any questions, just ask.
Northeast PA
16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5
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