It seems to me I'm using more chlorine than I should, so I started tracking how my Fc changes over time. I started with trying to keep 3 PPM chlorine with 30 PPM CYA, but have since moved to 5 PPM chlorine at 40 CYA. The data is a bit immature at this time, but it seems like I'm adding more chlorine now that I'm at 40 CYA than when I was at 30 CYA.
Is this consumption realistic, or should I consider increasing the CYA? The pool sits in full sun all day & water temperature has been in the mid 70's. Consumption rates are shown in PPM / Hr.