I use a pH meter to test, and recently purchased a new meter. For some reason, I was doubting the new meter and decided to double check with my old meter. I first calibrated both. Everything looked good, both were reading very similar. Today, I checked again with both and they're reading very off of each other. I made a calibration solution of 6.86 and checked each meter and they're both reading the same in the calibration solution, right around 6.8-6.9. But I test both my pool and hot tub, and they're very off, enough that I would need to adjust if I went off of one meter, but wouldn't need to adjust if I went off the other meter. What could be causing this???? Could it be related to other chemicals in the water? How accurate is the drop test for pH from the Taylor K-1000? Maybe I should just ditch the meters and go with that.....
(in case the pics are hard to see, in one cup the pH is reading 7.1 and 7.54 and the other cup it's reading 7.0 and 7.41)
(in case the pics are hard to see, in one cup the pH is reading 7.1 and 7.54 and the other cup it's reading 7.0 and 7.41)
