budnoob2
New Member
give em 50-100 PPM of cal-mag and see what it does
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I think this is not a heat stress, man. Dunno why, but my plant's first fan leaves looked that too, i thought about heat stress too, later when new leaves appeared, this ended and never have appeared again, despite that wattage of the lights have been risen 3 fold since then. IMHO do not think about it, just let it grow
give em 50-100 PPM of cal-mag and see what it does