Came across this article and wondered if it made any sense (down with flu and it was all a blur). I'd never heard of a low / high kh or RO / tap mixing changing the ph test result but this seemed to suggest it may be possible?
Anyone noticed their ph test result being out in very low or high kh water?
effect of ionic strength on PH tests - Seneye
Anyone noticed their ph test result being out in very low or high kh water?
effect of ionic strength on PH tests - Seneye