A better idea might be to leave the chlorinator on but supplement every other day or so with bleach when you find that the chlorine is getting too low. That will extend the amount of summertime that you're able to use the chlorinator.

What BigDave meant was that when your CYA get to where you want it, turn the chlorinator off and switch to an unstabilized form of chlorine, like cal-hypo or bleach.

Janet