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I think maybe they meant that you should flush/rinse the coco with ph'd water to rinse out any salts,etc... Pre-charge is using 1/4 dose of nutes ( like 2ml micro, 1ml grow,1ml bloom,etc) well for me it works out to about that. I pre-charge after rinsing coco, letting decent amount to drain off. depending on your coco it can contain high salts from how they process it, sometimes it's better buy like cocotek or cocogro both are good in my opinion and both low in salts. BTW what ph were ya using with your coco? is your meter calibrated often?What do you do to pre-charge your Coco? I used some Burpee Organic coco seedling mix last time and trouble right out of the gait. Someone said maybe the coco needed to buffered first, is that what pre-charging does?
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