Could someone explain what ec/ppm is??

• So for instance you have a random water sample and it comes back as 120ppm of total dissolved solids [aka hard water].
• In that sample 120 parts out of 1 million are various dissolved substances and the other 9,999,880ppm's are technically water. [With further sampling, this wouldn't be true, but for the example.....]

• So back to the example those 120 ppm's of various dissolved substances in your sample could be metals or semi-metals as well as non-conductive materials, but they will have a charge according to the amount of ppm's registered [as the little chart was provided above from EC to PPM].

DeeTee said:

You are right, in one respect, it is the measurement of the strength of your nutes, ec and ppm's are the same, just some meters measure in ec others in ppm's, I believe it measures the conductivity of the solution, but don't take my word for it, what's important is it measure the strength of your nutes.
I use this chart as a starting point and adjust as needed, bare in mind some strains can take higher doses than others, your plant wil tell you, just keep an eye on them, I've taken the liberty of converting to ec in case yours reads ec rather than ppm's, hope this helps.

PPM for Hanna Chart PPM

Seedlings, Early Sprouts ........100 to 250 = .2 to .5 EC
Early Vegging ......................300 to 400 = .6 to .8 EC
Full Vegetation ....................450 to 700 = .9 to 1.4 EC
Early Blooming ....................750 to 950 = 1.5 to 1.9 EC
Full Mature Blooms ..............1000 to 1600 = 2 to 3.2 EC

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Abiqua said:

PPM is usually the rough percentage of materials that remain in water both as total dissolved solids for instance and total suspended solids.

• So for instance you have a random water sample and it comes back as 120ppm of total dissolved solids [aka hard water].
• In that sample 120 parts out of 1 million are various dissolved substances and the other 9,999,880ppm's are technically water. [With further sampling, this wouldn't be true, but for the example.....]

EC is the electrical measure of dissolved substances in solution.

• So back to the example those 120 ppm's of various dissolved substances in your sample could be metals or semi-metals as well as non-conductive materials, but they will have a charge according to the amount of ppm's registered [as the little chart was provided above from EC to PPM].

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Castro4747 said:

thanks bro, this is the shit I was looking for, this real helpful man, on last thing, for example say I got 40 gallon res, do I put the nutrients in until 300 to 400 shows up and that's how I measure it?

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Castro4747 said:

safee brudda this shit helpful too, appreciate it.

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