Re: Perplexing stain problem, but I think I'll get there with some help
What are the chemical levels of your pool? If you post your numbers, maybe I can answer some of the questions. One of the only things I can think of is Acid takes metal stain out - that is why it is important to have your ph low when doing a stain treatment. If you had a lot of chlorine, and high alkalinity, then the amount of stain treatment you were putting on may not had a chance to work before it got eatten up. This is just a thought, but with all of us thinking we should come up with some help!
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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