Testing pH with high FC?

[Saturn94]

While certainly lowering CYA would make things easier for the OP, that wasn’t the OP’s question.

An simple answer was provided and supported by experts here.

 

[ajw22]

Reading that section, I believe you’ve misunderstood what it was saying. It is referring to testing pH when the sample pH is out of range of the comparator.

I understand that. But it equally applies to if you are diluting it due to high CL. Either way the pH of the sample may be changed by the dilution.

 

[Saturn94]

Out of curiosity I tested our tap water compared to tap water diluted with distilled water. Both tested at 7.5.

 

[ajw22]

Out of curiosity I tested our tap water compared to tap water diluted with distilled water. Both tested at 7.5.

I am not sure what that proves other then if your pool water is pH 7.5 it may work.

 

[Leebo]

 

[Saturn94]

I am not sure what that proves other then if your pool water is pH 7.5 it may work.

It agrees with what Joyful and Chemgeek have explained; members who know far more about chemistry then I’ll ever know (and who have never steered me wrong).