Paul, I did your experiment and it worked I put in the R-007, mixed and then the R-0014. PH came up at a beautiful 7.5/7.6. I then emptied out the container and did the test without the R-007. At first it came up 7.5/7.6 but then started turning that awful magenta again.PaulR said:Would you be willing to try an experiment for me? If the pH test does that looks-okay-then-turns-magenta trick again, please do this: Dump and rinse the pH tube, get a fresh sample, put in a drop of R-0007 and mix, then put in the 5 drops of R-0014, and see what happens.