My pool is in direct sunlight practically from dawn till dusk. Here where I live the temps are holding at about 105-107 F all day. I've been using liquid chlorine for months now and have gotten used to daily doses. Back in the winter I was using roughly 32 oz. per day when I was trying to maintain around 1.5-2 PPM FC. I found out that THOSE numbers were too low considering my CYA level of 35-40 and was told that higher FC was not only recommended but was safer than keeping the FC at 1.5-2.
I've attempted to keep my FC levels at about 4PPM now for about a month and a half and my small algae pockets have started to dissipate. I've also been scrubbing them manually.
My new problem/question that has arisen is this. I am now adding 186 oz.'s of bleach per day and it is still not enough by the end of the day to have maintained a level of 4PPM. As a matter of fact, by the end of the day the FC levels are back down to 1-2 range.
I've been testing in the morning before the sun is high and hot and I read around 4-5 PPM. But after the sun has gone mostly down and but there is still light in the sky I test again and read about 1-2. Sometimes maybe even less than that.
My CYA level again is at about 35-40 using the TF-100 kit that I bought. My questions is......is this amount of chlorine burn off normal and expected given the weather conditions I live in and the fact that the pool has full sun all day? If not normal, where am I wrong. Elevating CYA any higher would just require more chlorine anyway so as to make up for the loss in effectiveness by adding more CYA right?