OMG that is WAY to much Cal-Mag.
This is a feed chart from Canna Coco for 2 gallons, Most autoflowering plants will be happy at 50% - 60% strenght of this chart. No where do you see to add any Cal-Mag at all?
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Very seldom do I recommend a full flush but you are headed for disaster if you do not get that Cal-Mag out of the pot!