Viewing post #1062440 by sooby

Seedfork said:
Now I could be wrong, but the reason I have no faith in these readings is because no matter where I stuck the thing I got almost identical readings (maybe just a fraction off in either direction).
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Depends how much of a fraction, since the pH scale is logarithmic (each point 10X different from the next one etc.). If the probe can be inserted in liquid (some say not to) try it in vinegar and then milk.