Update with today's readings, officially 1 week after adding CYA
Ph7.5, FC 7, CC 0, CH 275, TA 60, CYA 30 ...salt mystery continues took 2 readings with aquachek strips, last one was 7.3, or 4885 ppm - which I tend to believe. First test today was 3.2. Maybe I had some bad strips? Anyway...