I just got back from putting the pool to bed and realised that I did both my tests on a 50% dilution sample. I know you can multiple FC by two, but that's not true for pH. Is there a way to work out the true pH from the pH on a 50% dilution sample? I think I read it on here once, but now I can't find it again.
The pH at 50% dilution was 7.65.