What would "shock level" be considered?

[cooper]

I've been reading but can't seem to find the answer. Last year it was hard to hold my chlorine level. It would go from 6 to 2 overnight. Hopefully it won't happen this year. I believe my CYA was in the 30 to 50 range. What I've learned here is to hold a shock level until the chlorine loss stops. My question is what is proper shock level?

Thanks
Cooper

[Watermom]

Depends on what your CYA level currently is. See the Best Guess Chlorine Chart in my signature below.

[cooper]

Thanks Watermom!