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What's the Deal on PPM?
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August 24, 2016
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Ricky Shaw
Tomatovillian™
Join Date: Aug 2015
Location: Zone 6a Denver North Metro
Posts: 1,910
And if are a zero ppm, you probably need to add some hard water back in for the ferts to bond to. If not, you can get whacky meter readings. A nice source water is like 60ppm with half of that being calcium.
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