Brown stains spreading

[gregugadawg]

take a water sample to your local pool store and tell them you need stain remover. Be sure you use a metal remover when you add the stain remover as well. This is going to work since the vitamin c worked on the stains. You will however need to lower the chlorine level to less than 1 before treating the stains.

[waterbear]

I would say Marie is right on the money. She is pretty much the expert on stain treatment around here

Brown stains are usually caused by iron. Might be intersting to get your water checked but then again, once the stain has formed the metal is no longer IN the water, unless it is a recurring problem such as your fill water.