Thank will look into it how would I creep it up with stabilizer?Awe yes, lake water, I remember now. Has the water cleared yet? The disappearing dot CYA test cant really tell between 0 and bellow 20ppm. I would think that lake water wouldn’t have any CYA but there’s no guarantee which is why I’d suggest creeping up on you target value slowly. According to PoolMath each 11oz dose will add 10ppm of CYA. Without a SWG you wanna be at about 30-40ppm.