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Growing perfectly needs balance.. Maintaining the pH and ppm (parts per… | by PeaceLovingHippie | Medium
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Total CO 2-eq (ppm on left-hand scale and metric tons on right-hand... | Download Scientific Diagram
Athena - PPM stands for parts per million & is the most common domestically used unit when measuring TDS. EC stands for electrical conductivity, which is a measurement of the ability of
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