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I had been growing in coir with no pearlite, using advanced nutrients ph perfect sensi coco and run into the same issues with two separate grows, 4 strains total. I followed the grow calculator to the letter and used ro water checked ph 5.8 and runoff 6.2. And no matter what I got what appeared to be cal mag issues so I started adding calimagic @175 to 200 ppm and still the issues persistented. I have recently switched over to jacks 321 and haven't had any issues thus far...
Advanced nutrients ph perfect
Advanced nutrients ph perfect
from Hydroponics / Aeroponics
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