Quote Originally Posted by chem geek View Post
... The FC level itself is a measure of chlorine capacity or reserve so is mostly relevant if you were to drink the pool water, which you generally do not do (at least not in large quantities).
Unless you are my 5-year old!

Seriously, the only other factor you should consider is if you have a vinyl pool there is a chlorine level, depending on your CYA level, that fades the vinyl.