From what I’ve read on here, my FC needs to be at 7.5% of my CYA level to effectively sanitize pool water. When I put a CYA level of 60, the app suggests 7ppm as my target FC level. Based on the 7.5% rule my FC needs to be at least at 4.5ppm. I get a little buffer but is the rest of my levels are good, so I really need to raise my FC to 7ppm.
FC - 6
PH - 7.6
CYA- 60
TA- 70
FC - 6
PH - 7.6
CYA- 60
TA- 70