It's true that finding grandular floc is getting harder, though also in
my experience in the pool industry having a good level of pH is a must
now matter what's going on.

When you have low pH chlorine shock will not work as hard because the
acid in the water eats up the chlorine fast which doesnt let the
chlorine work long enough to do its job.

Also having low pH can also damage any metal that your pool might have
such as, heaters, ladder poles and parts in your automatic pool
cleaner. Even your liner is at risk overtime in low pH conditions. So
make sure you always check your pH level, it is very super important.