How much Chlorine is too much?

[Dave S.]

With CYA of 30, chlorine of 15ppm should be fine. If you look in the chart above, cya of 30-50 we suggest 15. But, since you are in the lower end of that range and a little unsure about taking chlorine up to 15, why don't you try taking it up to 12 and keeping it there consistently. That may be high enough to take care of things. If you find that it isn't, you can always bump it up to 15 in a day or two if necessary.

Will do. Thanks!!