adjust cya before or after shocking

[BigDave]

Welcome home, hope you had a great time.
Since your K-2006 is coming soon, let's do this: Let's get the pool back to shock level and mainatain that until we can get reliable and accurate reading for CYA, FC and CC (with the new kit). If you have 2 gallons of bleach on hand, put 'em in now. Start the pump and leave it running - backwash as necessary when the pressure rises 8-10 above clean. If you don't have the K-2006 by this evening, test CL by dilution again and let us know.

[Kateyru]

will do!

[Kateyru]

Just tested with my new K2006. Here are results, FC = 16, CC = .5 and CYA = 30. What's the next step...retest in the morning?

[BigDave]

Yep, as close as possible to sunrise. You want to find out if you've lost any FC overnight. The fact that you have .5 CC is significant: it means your chlorine is getting rid of something in your pool. In the morning, if you have lost no FC and have lss that .5 CC, you'll be ready to declare victory. At this point, you'll probably have to maintain shock for another day. You are very close, keep it up. let us know your readings in the morning.

Congrats on the K-2006. I find it sooooo much eaisier than any other kit I've owned.

[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.