I bought this to measure pH in my aquariums (thought it would be easier than strips). I performed the calibration as instructed and the results are still inaccurate. The PH fluctuates quite a lot all the time and is higher than the test strips I usually use. I'm not sure if I set it correctly or if it's just not accurate, but I'm not very happy with it. Again, this could be 100% user error, but I can't confirm it as there were no additional packages to check.
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