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How do I check the Vivosun TDS & EC Pen for accuracy
Discovered my VivoSun EC meter was lying. Read ok in the double digits, but after that, way low like 90%. Went with Blue Lab, and what it tells me seems more plausible. Have not determined accuracy of my Vivo PH pen.
DougF
Post #9
Jul 8, 2021
Forum:
General Marijuana Growing
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