I've been lurking on the forum for a short while gathering a bit of information to help me now that I fired my (worthless) pool guy.
I'll give a bio of myself and my pool in another post, but for now I'd like to know why any amount of cyanuric acid is needed.
If my understanding is correct, CYA combines with FC to prevent FC from being degraded by photochemical reaction due to sunlight. However, by bonding with FC, CYA effectively reduces the amount of FC that's available to do its job killing bacteria and algae. I've not read anywhere how the CYA+Cl bond can be broken, thereby releasing (Free) Cl back into the water. It just seems like CYA is a "chlorine sponge" that only soaks up chlorine, but doesn't release it.
If this is the case, aren't we just as well off totally avoiding products with CYA and just add straight up chlorine as needed to replenish what has been consumed by sunlight and chemical reaction with the stuff it's supposed to kill?