JasonLion said:It is time to shock the pool. With a CYA level of 60 your FC shock level is 18. The basic idea is to test the FC level, add enough chlorine to bring FC back up to 18, and repeat that process frequently (as often as once an hour, as infrequently as twice a day) until the FC level holds overnight and the CC level is zero. There are instructions at Pool School.
Just clarifying for myself, for a CYA level of 60 wouldn't they need to bring the FC level up to 24 to shock. That's what I would think based on the CYA/Chlorine relationship chart. I just want to make sure that I'm understanding the chart correctly.