I've started using a little over 2 ppm per day of chlorine. This started about 3 weeks ago.
That's up from .5 ppm (or less) a day before Winter.
My temps are 40 something at night and 70's during the day.
I just measured CYA and got 50, 40, 50 with three tests.
Pool is clean with a few leaves getting into it each day. I keep them cleaned up.