Hi all I've just noticed some fan leaves going yellow. At the moment they've just had 3 weeks on big bud this is now the first week on overdrive with canna a/b. Feed in is about 1.3 1.4 ec the run off is hitting 2.0 didn't empty run off last time. Growing in coco can put photos on later just gave them a flush with plain water and dropped to 1.6 ish any help plz
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