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Heavy-Duty Timer 2 4 6 8 Way Box Grow Light Electric Contactor Hydroponics

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Quick question on PPM

Okay, so my TDS meter showed up today and I did a quick test of my nutrient mix. It showed a PPM of 254 (which I assume works out to .508 EC?). Now, I had a chart that said the recommended 200-400 for the first week (I'm still in seedling stage).

My question is, do I measure the water, "pre-nutrient" then add the nutrients until the readings equal the 200-400, or do I get the base number and add 200-400 to it? (So, if the starting water was 100, do I still shoot for 200-400 or am I now...

Quick question on PPM


April 01, 2020 at 04:59PM

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