OK - I'll get the bleachcalc and get it up to 16.

What about shocking? Should I be doing this as I do have a CC reading. Does shock have any bleach in it?

Test question: When you do the CC test and the water turns clear after adding the #2 reagent, does it sometimes go back to pink after a minute or two? Should I add more reagent - count those drops and keep waiting - maybe five minutes for no change.

Thanks