IS THIS HEAT STRESS???

These are 7 week old autos this problem stated about 4 days ago I've moved my light up to about 14 inches above the canopy but i think the problem is still progressing

looks like a potassium issue or mag

sss0000 said:

looks like a potassium issue or mag

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Are you thinking it's too much or too little I'm using the floro grow trio and kool bloom for a pk booster

i think its a lockout so your plant stopped uptaking the potassium it needed and by the time you caught it its was to late to fix. personally week 2 of flower i add extra potassium magnesium to my feeding.