What chlorine level to shock -- now that half my CYA is gone

[JimK]

Just checked FC...dropped to 16 (from 25.5 early this morning). Today was sunny all day. Hopefully it will hold overnight. If not, should I bump it back up to 20?

[PoolDoc]

Nah. Unless you have algae or slime, let it drop to levels appropriate for your current CYA level

[JimK]

Thanks. No algae or slime, so I'll let it drop to normal. 5-6 seems to be the sweet spot for my pool given CYA 60-80 recommended by my SWCG manufacturer (Goldline Aqua Rite, now Hayward).

[PoolDoc]

Sounds good!

[JimK]

7:30am this morning:

FC 13
CC 0

So it dropped 3ppm overnight. I expect by this evening it should be at the target range (hopefully not under!) and should be able to measure/tweak everything else as needed (pH, salt, CYA, TA, and borates).

[PoolDoc]

Sounds good.

[JimK]

I just wanted to say thank you for the help dealing with the byproducts of CYA biodegradation. I won't bore you with the latest numbers other than to say I just need to tweak a few levels before I start up the SWCG.

Water warmed up to 76 today, so we officially kicked off the 2014 season by getting in!

Thanks again.

PS - I don't care that some years ago my (ex!) pool person at the pool store said y'all are just some nuts on the internet and don't know what you're talking about, y'all are A+ in my book.