tough stains

  • Last Post 10 May 2018
Jeff1958 posted this 10 May 2018

I have vinyl lined inground pool with black streaks appearing on the bottom. They are impossible to remove and I think they may be metal stains. What can remove these?

InyoRob posted this 10 May 2018

Hello Jeff - We would recommend trying Stain Free Extra Strength by Natural Chemistry. This is an industrial strength ascorbic acid.