New liner installed last spring, CYA kept at 30, FC at 3 - 5, with two shocks performed over the summer (12 FC or so).
Liner at closing was slightly faded at and below water line, all the way around pool/
Liner supplier as expected, thinks normal FC of 4-5 is crazy high and the cause of fading. 12 at any time is crazy.
What are your thoughts on cause?