I am systematically trying to undo the years of damage from using pool store supplied advice and products. I started by slamming the pool. The yellowish marks on the bottom of the pool remain and after reading other posts I began to understand it was likely copper staining. I had my water tested today for that today and it is present/high. I already replaced half of the pool water to lower the CYA (successfully), so water replacement may not be the solution.
I purchased vitamin c to work on the stains but what do I need to do to lower the copper?
I purchased vitamin c to work on the stains but what do I need to do to lower the copper?