For some reason my phosphates level (according to test by Leslie's) has been high over the past 9 months. (readings: 5/28/23 - 5 ppb, 7/23/23 - 241 ppb, 10/2/23 - 663 ppb, 1/18/24 - 530 ppb). They sold me Leslie's NoPHOS to use. Before I used it, I decided to have my pool replastered with...