Do I have the following concept correct or am I missing something?
I understand that free chlorine consumption is by a percentage of free chlorine available. For example, I could lose ½ to 2/3 of my free chlorine per sunny day if the pool is exposed to the sun.
My CYA level is 40 using the turbidity test from Taylor. Therefore, my ideal FC range is 3 – 7 ppm. I test the chlorine level late in the day and add enough liquid chlorine to bring the FC level up to 7. So, theoretically, if I lose, for example, ½ of the FC per day, I would lose 3.5 ppm of FC. If I had brought the level up to 8 rather than 7 and lost ½ of the FC, I’d have lost 4 ppm of FC. From an economic standpoint, it seems I would be wiser to bring the level up to 7 rather than 8, provided I never dropped below 3 ppm.
Do I understand this correctly?