what the hell does PPM mean??

I bought a new Ph tester that also test for your n-p-k levels and it measures in ppm. so I was just curious if anyone knew what that measure should be for soil. what should it be kept at during all the stages of growth. Help me out guys! thanks!

what nutrients are you using?

ya i usually keep mine at 300-400 until visuall growth then i will jump up slowly to 800-900..until midlle of flower then iwill crank it to 1200 until shows burn then back off to 1100-1000..be care ful some strains only need 800 the whole time..anyways does ur meter measure ec its more accurate cause ppm is measued by ec then converted in ur meter..maybe this will help late ar1

we're using general hydroponics flora nova- grow, flora nova- bloom, and sensi cal mg mix. but so far we've only used the sensi cal b/c we over did it the first time. Im not sure what it measures yet. i still havent got it in the mail yet.