thanks for looking everyone. well, heres the facts: plants are about 4 weeks old in sunshine mix #4 amended with perlite and lime. nute are jacks classic and dyna-gro on alternating schedule. a water, feed, water schedule. also low doses of calmag and molasses, alternating each with feedings. ph in is 6.0-6.3, with suggested amounts of each nutes. the first two pictures were taken when the symptoms first showed up. i watered with jacks and within 48 hours the leaves did that. i poured phd water through and the ec was 3.0 so i flushed em out. down to about 400 or so and ph 6.3. its two weeks later now and theyve been fed at increasing nute strenghts with water in between and its showing up again. looks like potassium deficiency sort of, but i cant figure out why. if it was due to lock out, shouldnt i have fixed that? oh, temps in veg room are in between 72-80 with 40-55 rh. i appreciate any help. really!