Rust Stains

[ridery]

Hi,
We have an indoor fibreglass swimming pool and eversince construction of building we had it covered with wood but when we uncovered we notice a lot of rust stains in the pool. Would someone know how to take the rust stains out

[Pooll]

There are rust stain treatments for fiberglass pools. They are usually oxalic acid and your pool store may stock it. Ascorbic acid also works well, and if you can find that, you can use vitamin C tablets.

Once you get rid of the stains, it would be a good idea to use a metal-out treatment to prevent recurrence of the stains.