When using a TDS meter is there any set ppm that you want your nutrients to be at for certain segments of the grow? Where should the ppm be maintained is basically my question.

I just read this stuff in a very recent thread. Obviously this also depends on your setup and lighting.
Check out Latewoods post. Its the third one down.
is 1600 ppm too high ???

Down load the chart in the grow FAQ it shows the PPM for each cycle. It's for General Hydro 3 part so the portions are for their product. The final PPM number is still correct and anybody can use that.

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Zandor

If you go cheap you grow cheap. - Me