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Sorry I mistyped, at the beginning I use only Grow and Micro, not Bloom and Micro.

In addition if you have hard (Cacium rich) water (EC>0.4) you should add osmosis water to lower plain EC. AH Micro has a lot (7%) of Calcium in it. Together with water initial calcium this may lead to lockout.

I disagree with potassium deficiency. I use Advanced Hydrophonics of Holland myself on Coco. It has more than enough Potassium, I always find it hast too little Nitrogen in its mixture. I usually start with nothing, then half of dosage only Bloom and Micro adding some more Mono Nitrogen. The...