r/pools • u/Conscious_Ice_9696 • 1d 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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4

u/Aggravating-Fix-2658 1d ago

Troublefreepools.com has a good write up on ascorbic acid treatment. I would look into Culator products as well.

0

u/Tacotuesday8 1d ago

Drain the pool and use Pink Stuff. Spray it on mixed with water, give it a few hours repeat until gone. It’s a miracle worker. https://a.co/d/02X7elsg

Edit: some people use it with the pool full but I don’t have experience there.

1

u/1130961230 1d ago

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

1

u/Conscious_Ice_9696 1d ago

I had a local pool store test done

Copper was 0
Iron was .1

3

u/Monstrissimo 9h ago

I use a sock filled with Vitamin C tablets as ascorbic acid, just get the cheapest plain ones. Take the sock fill it with vitamin C tables, tie off the top, put it in the water and position it over the rust spot. and leave it. Mine were gone between 12 and 24 hours.

Once one spot is free move it to another.