Wayne,

You must test before you add ('til you figure out how much Cl you're consuming).

If your water is not yet as sparkling as you'd like, Test and add enough to get you back up to the 25ppm range.

Once your water is fine, test and then add enough Cl to stay within an 8-5 range. You'll probably add quite a bit for the first couple of days, then your Cl consumption will drop off as you no longer have to kill so many "bugs"