No worries. Hope you’re feeling better.
Thanks for your info.
I’ll now research slurry testing.
Cool.
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It’s easier than you think. Those run off numbers you had earlier are confusing. Have you calibrated your test pens? Try this first seeing as you adjusted your tap which you should never need calmag if those PPMs are correct. Use distilled water and run it through your pot and catch a little after about 5% has passed threw. Distilled water has a neutral PH of 7 if it hasn’t been exposed to the air for too long and a TDS of 0. So pouring this through your medium will give just the mediums results and no water additives 
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out growing you? i think not my ever so wise freind. i think if any of us grew as much and prof. like you we would be doing something.