I guess I may be just anal about it but We test Chlorine (25ml FAS-DPD) and pH AT LEAST daily. Sometimes more often. As for the other tests, every other day.

I admit, I am intentionally keeping the CYA below the normal range (25 ppm) and I am running a bleach injection system that I am still learning.

Water is sparkling and smells good (something you have to learn).