I read this on another threadSunlight uses up more chlorine when the water is warm than it does when the water is colder.
I know this to be true but I don't have a firm understanding of the reason. I read one thread that said the warmer water basically creates a better environment for algae to grow but that it really doesn't cause more chrlorine use. This seems contradictory because basically it does cause more chlorine use, if only to fight the more present algae.
Also, why does the pool calculator not account for temperature when using free chlorine figures? I can try and raise my FC by 2 at 50F and at 100F and the same amount of chlorine is needed according to the calculator. I suppose the answer will be: because the water temp, doesn't effect chlorine consumption, while in reality it really does, it effects it drastically in my experience.