CC - Wont go down!

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UV AOP system arrived today, will fit it next week.

Last question: CYA

We run between 15-25 PPM CYA as a moderator to reduce the harshness of our chlorine levels on the swimmers in our pool,

Would this negatively affect the AOP process or actually help, I'm thinking help as it'll protect the FC from being eaten by the UV but allow the CC to be removed by the system?

Is this the case or is there a change to CYA that would be required to achieve the best out of the UV system.

Cheers

H