I’m full of questions tonight. What is the consequence of running the pH a bit low to try to make up for the “Chlorine/CYA lock?

I know the “ideal” is 7.5 pH & 40 ppm CYA but--------

I’ve seen charts that put chlorine effectiveness at around 50% at 7.5 pH, but up around 75% at 7.0 pH. Then the next Chart says Chlorine effectiveness is reduced by high CYA. (>50ppm).

What I am getting at is can the two conditions (low pH & high CYA) off-set the effects of each other or doesn’t it work that way??

27000 gallon In ground Vinyl DE filter