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thanks for the feedback. I tested CYA this morning and it read 40 now that the water is a bit less cloudy. My FC is still at 17. Since it will take a couple days to get the FC level down to 10 so I can test PH, is there no value in adding acid now? I know the PH was high before the shock...

Friday afternoon I tested the water with my K-2006 FC 5.5 cc 0 pH 8.0 or higher, was really red TA 150 CH 180 CYA 35 We had a huge rainstorm on Friday night and I woke up to a green pool, there was what looked like green dust on the bottom and on the tile. The FC level was still around 5 in...