When Pools Turn Purple| Pool & Spa News
Mar 19, 2018 · This can reveal itself in the form of purple crystals along the waterline, skimmer basket, walls and bottom. It’s one of the prettiest chemical imbalances you’ll ever see. Ray Rescildo, owner of Certified Pool & Spa, in Plymouth, Conn., recalls responding to his first Code Purple. A vinyl liner had a periwinkle tint to it.