My CYA is about 45 so my minimum chlorine level is 3 - 4.
I add liquid chlorine each evening after testing with an TF100. Up to now if have been trying to add chlorine to get to 5 - 6 so it is back to 3 - 4 the next evening. Everything seem OK with bright clear water but I am now wondering if I actually should be trying to adjust so it falls back to the target chlorine level 5 - 6 (not the minimum level 3 - 4) the following evening. It seems if I target this higher level I'll use more chlorine (at a higher cost) as other posts suggest you'll lose around half the chlorine level to sunlight each day