Help identifying a stain

Nfrisa

Active member
Aug 18, 2023
34
Baton rouge
This stain has been present since shortly after the pool was built (a little over a year ago). I’ve never had algae problems. It hasn’t gotten bigger or smaller over time.

I’ve tried to scrub it off but go nowhere. It may be hard to see but it is on the plastic jet as well as the plaster. I did take some very fine wet sandpaper and get it off the plastic jet but it came back.

The picture may not accurately portray the color. The best way to describe it is a rust color.

Any help would be appreciated.

IMG_9531.jpeg
 
Take some vitamin C tablets, put the in a sock, crush LIGHTLY, then rub the sock over the stain. See what happens.