Brownish-gray stains in vinyl IG pool

[gumbeaux71]

Thanks Dave and everyone else.
You are right that no one on this site recommended lowering my PH so drastically. The "helpful" woman at the pool store did. LOL. I've actually been lurking around this site (previously under gumbogal) for a long time. I use the BBB system except, I got lazy this season. I need help from hubby to take off the pool cover for testing/maintenance and I was lazy about asking to him to do it. (He totally would have had I just *asked*. )

So, when we opened the pool and saw the staining, I asked at the local pool store about it because I wanted to get right on it and couldn't remember my password here to ask for advice! The lady there had me convinced it was metal, but I knew something had to be up when the Vit. C didn't work. ARGH.

Oh, and BTW, I get nada when I test using the DPD test (I have the PS233 kit). I only applied one dose of YellowOut, but I guess it's still eating my chlorine. I'm going to follow your advice of keeping the Cl up and brushing. Thanks!

[gumbeaux71]

Waterbear,
Thanks for the link to Ben's post. I actually read that many moons ago when I first became a pool owner, but before I knew just what "adventures in poolcare" awaited me!

Makes a lot of sense now!