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Can someone please help me understand this. I am growing in 50/50 coco & perlite using General Hydroponics Grow and Bloom for coco. I am currently in Veg feeding my plants 600ppm and feeding every 2nd day(one day feed, one day nothing, one day feed, one day nothing etc..). My plants are...

If I understand correctly your control rez must stay open with the lid off so that the air can mix with the waterfall that returns to the control rez. Because if everything is sealed and there are no air holes or anything how does the air exchange happen. And one of the reasons to ditch the...