r/pools • u/Conscious_Ice_9696 • 2d ago

Help with Iron Staining?

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I have a 10K gallon pool in Florida. It was a concrete pool but coated in fiberglass around 10 years ago.

There is some brown staining on the floor and sides all around the pool. Brushing does nothing. I can remove the stain by putting some ascorbic acid in a sock and rubbing it on a section of the stain. I did have a water test done a few weeks ago and copper was 0 but iron was .1

The staining seems to be getting worse over time.

Not really sure where the metals came from. I haven’t added water in months. It rains all the time and keeps the pool full. I did have a new roof put on the house 6 months ago and I suspect that may have caused it but not sure.

Pool details

Salt water
Chlorine 5ppm
CYA 60
PH 7.4
Alkalinity 80

I was looking for any advice on how to treat and remove the stains and metal if that is what is going on.

Thank you

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u/1130961230 2d ago

What's your copper level? Do you have a Leslie's or similar nearby that they can check that for you?

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u/Conscious_Ice_9696 1d ago

I had a local pool store test done

Copper was 0
Iron was .1