What is Reddit's opinion of
15 Pack PH Calibration Buffer Solution Powder Set, for Precise pH Meter Calibration, Make 250 ml of Each 4.00pH, 6.86pH, and 9.18pH to calibrate Your PH Tester?
From 3.5 billion Reddit comments
1 review of this product found across Reddit:
1 point
·
23rd May 2019
for PH i own this one and i bought this calibration solution.
For PPM this guy.
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People highly recommend BlueLabs however, Im poor and these work LOL
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