PPM....this brings up a question.

I have a question about the whole PPM thing with nutes.

I bought a PPM meter and have been checking my nute water. I keep it at betwen 600ppm and 800ppm as someone suggested. When I use GreenLeaf's Megacrop + Sweet Candy + Bud Explosion at 1/2 dose, it reads as about 700ppm.

I was wondering this; my water has 150ppm to 200ppm anyway and so this figures into the PPM equation. Does that mean that I can actually up the nutes to 800-1000 because my water is supplying the other 200ppm?

I guess I'm just not sure what it all means.
 
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