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EC and PPM
stumay111started grow question 4 years ago
I read about EC and PPM. I have a meter that reads both, and it says my PPM is too low, and the number it gives for EC is like 1200 and the charts all have numbers like 1.2-2. WTF.
I ran out of pH strips but I know my pH is good, I used distilled water. What's everyone's thought?
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the_canna_scientistanswered grow question 4 years ago
EC and PPM while linked generally are two different measures. One is simply measuring the amount of particles in the water, and the other is measuring Electrical Conductivity. Do you have a Salinity measure on your meter? While EC runoff is generally a good way to measure the fertilizer salts / nutrient uptake, a salinity meter is the best way to see if you have excess salts. I'm currently working on a write up on the relation of PPM to EC to Salinity.
Athos's answer is correct. I was just adding some color.
Athosanswered grow question 4 years ago
I have one of those EC / PPM meters, they are fairly easy to use. Your reading of 1200 is in uS/cm, which is the same as 1.2 mS/cm or if you convert it into PPM 600. Hope that clarifies it for you. Most info around has the EC in mS/cm, just divide your reading by 1.000
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The8thChevronanswered grow question 4 years ago
If it says 1200, that's your ppms, which is a little high. A mode button should switch you to EC. Sometimes the EC charts will read as 1,2 instead of 1.2. Your ppm reading is based on EC. Your meter reads the EC and calculates the ppms based on that number.
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