CYA Problems

[waterbear]

Can someone straighten me out in lamens terms?

I thought had had most everything figured out, now I think I am confused again !!!


25000 gallons
Chlorine - pool store said 1ppm, Wal-Mart test kit said around 6ppm
(is the difference caused by one measuring FC,TC,CC and the other measuring FC,TC,CC) I have know idea!!!!!!!
CYA - 20
PH - 7.7
TA - 120

I know cya stabilizes the the chlorine level, but If it takes less bleach to sanitize a pool with a lower CYA then why would I want to raise my CYA to 30-50ppm like most people suggest.

Will I add less bleach in the long run with CYA at 30-50ppm compared to CYA at 20ppm?


Thanks in advance!!!!

CYA helps prevent the chlorine from being burned off by sunlight. If it is too low you might go thorugh more bleach trying to keep the level up than if you have the proper level in your pool. If you have too much the chlorine becomes less effective at santizing and destroying algae. 30-50 ppm works well in most outdoor pools (60-80 in pools with a SWG).
Hope this helps.