adjust cya before or after shocking

[Kateyru]

Do I test FC, CC and CYA again or just FC and CC?

[Watermom]

FC and CC. No need to test CYA again for awhile and you don't want to waste that reagent.

[Kateyru]

I didn't think so but wanted to make sure! Thanks.

[Kateyru]

This morning test results: FC = 18.5 and CC < .5 Dd I need to add more bleach? If so, how much? Thanks!

[BigDave]

Test as often as you can and bring the FC back up if it drops below 15.

[Kateyru]

will do, thanks!

[Watermom]

Did you add bleach after you tested last night? How did your FC go from 16 to 18.5 overnight?

[Kateyru]

No, I didn't add bleach after last night's test so I don't know how or why FC went up. Tester error? I am trying very hard to test accurately. Summary of today's test results: 6:30 am, FC = 18.5 and CC <.5 11:30 am FC = 17.5 and CC = 0 3:00 pm FC = 14 so I added 96 oz. of bleach 6:30 pm FC = 18.5
Next steps?
thanks

[aylad]

Just keep doing what you're doing, until you're not losing any chlorine overnight. Then you can let the chlorine drift down to the normal range for your CYA.

Janet