Pool is new as of September last year so still in the testing water for chlorine, ph, and TA almost every day. One of the other reasons for doing it myself is pool service and I have been working at odds with each other. Their TA target is somewhere above 100 and ph rises almost daily to high 7s or 8+. Plus they get chlorine of 3 when I get 5. So I get these wild swings in numbers. Manage in between but after all my reading on this site realized, I can do this.