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growth stops or slows, good ph keep @ 5.9 -6.1, ro water @ 8ppm before nutes , rdwc, I keep diluting the nutes from 240ppm ish to now @ 110 ppm with advance GMB, B52, ca-mg and voodoo juice. roots started growing nice white but nothing else?? aauuuggghhh?? What causes stunted growth and...

I would make sure your PH meter is calibrated before anything else is done. I am having the same problem and just received a new meter and my old one was out by 2 full points. When it read 6.4 it was actually reading 4.4 !!! WOW Will update when I see improvements . Good luck