Question on nutrients/ppm

can someone help with this? I saw this grow chart that had fertilizer by week in ppm. My question is, is the ppm in these charts the total of the the water plus fertilizer, or just fertilizer? My water already comes in at 125 ppm. thank you.


If your tap is 125 PPM and you want to feed with a PPM of 500, then the PPM of your feed should be 625.


Thanks…. Not sure if growing is a science or art, I’m thing a little of both!


Doesn’t hurt to be a master of time either.

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