I did get metal readings this spring when I took my well water to be tested by pool store. Since use well water to fill my pool, I have been adding metal magic every time I add water. The large brown stains on the side and bottom were clear when Vit C was applied so I have assumed that this meant that the stain was caused by metal and not algae. This is why I thought I should keep my ph at 7.2 Am I correct? ..... Or have I overthought something