Deficiency ? What do you think ?

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Für mich sieht das nach Phosphor Mangel aus ! Calmag sieht definitiv anders aus !

to me looks like heat or light stress is ur light to close what temp ur grow at

magnesium. by look you are growing in coco, add epsom salt , worst case - use some calmag.

There could be a number of reasons. Your food has enough of everything in it so I'd start with checking your PH.What leaves are effected, new or old leaves. I wouldn't just add more cal-mag though. If using LEDs make sure its warm enough. It wants to be at least 27.

The leaves appear to be showing the start of potassium deficiency. I see you’re running 200 ppm, so bump that up. Not sure if you’re in soil or coco, but get your ph right for each medium. 5.8 coco 6.5 soil. As always, calibrate your meters. Best of luck on your grow.