Hello everyone. I’m a pool owner for a little over 3 years. We have a Viking Laguna Fiberglass with a Pentair SWG. Unfortunately we have the white staining starting below the water line that started this year. It’s a dark blue pool in Florida so that white discoloration below the water line is very obvious when the level drops. Tried everything but pretty sure the copper in the algaecide was a contributing factor. That’s what brought me here.