Wow. The TC level took about a day and a half to come down to around 10 to 12 from 20. Level of 10 is what I needed to be able to swim again at my CYA level. I guess that means my pool did not have much to shock out. Is this the reason y'all suggest not to shock unless it absolutely needs it?

I wonder if I could figure CC by using the TC reading versus free chlorine reading via the strips until they are gone? Is CC figured TC minus FC?