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PPMS?
Herroqittistarted grow question 3 years ago
What’s the simplest way to understand parts per million? 1 gallon of water, ph 6.86 ? I took multiple readings of the run off water from different spots of the tray and finally ended up pouring all the run off into a cup . The plant is about 90 days old. Week 7 of flower.
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Feeding. Chemical composition
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Chow_13answered grow question 3 years ago
PPM is a non standardized measurement. its a calculation from EC electrical conductivity. the calculation is ec * PPM scale. this scale is usually 500,650 or 700 depending on the manufacturer. Minerals and Nuturents in the water make the water more conductive and give a higher reading. Since you poured the water in the cup you mixed some stuff that had settled and that is why you got a higher reading.
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