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Jack321 ppm

Im mixing jack part A 11 grams + part B 7grams + 3.3grams epson salt into a 3 gallon container full with tap water + ph amd im getting 150ppm. Should i add more of the 321 powder mix to increase it or is my tds meter busted?

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    • I use Jacks and I have found them to be spot on their predicted PPM if you use their feed mix so I think your meter is busted or our of calibration, I went through the same thing and I asked them about it, first question was is your meter calibrated, no it was a cheap meter without any calibration, a new meter fixed the problem. I would like to find one that can be calibrated. 

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