Why does the SWG CYA chart not show values below a CYA of 60?

Rockstead

Well-known member
Sep 2, 2010
385
Montreal, QC, Canada
So I’m opening my SWG pool from winter.

From experience my CYA is at around 20 after winter.

It’s still cool outside, some sun but not much heat, so I typically like to leave my CYA balancing until I’m done Slamming and adding the other chemicals, is there an issue doing it that way?

Can I just follow the non SWG CYA chart when my CYA is around 20?
 

Rockstead

Well-known member
Sep 2, 2010
385
Montreal, QC, Canada
Rock,
Under 60 you treat it like a non SWCG pool as far as FC minimums and targets.
Thanks for confirming, any issue with my approach of keeping CYA low until the rest is balanced? Takes less Chlorine this way, unless the weather was nicer and it would eat up what I had.

I’m assuming chlorine lasts longer when the temperature is lower in spring.