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Old March 1, 2018   #4
Tiny Tim
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Join Date: Feb 2018
Location: Near Albany,NY
Posts: 90

Thank you both for your advice. I could send off a sample to our local lab. I'm more interested in being in the will grow ball park. I would assume many manufactures could meet a reasonable range. Either Burpee is not one of them or I have a defective meter. I never have issue's growing in coco coir using liquid nutrients. I have 2 cheap meters and one better meter and they are very reliable for liquid. I guess I'll resort to testing runoff using distilled water. Thanks again..
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