fan leaves showing signs of ?

7 wk old white widow has fan leaf issues
vegging under 300 watt hps
Botanicure ppb grow 2 ml
liquid kharma 5ml
calmag 5ml
aquashield 5ml
hydrow system

Almost looks like a Potassium deficiency... Perhaps a Calcium def... I'd recommend getting Ed Rosenthal's 25th Ed. Marijuana Grower's Handbook to make sure, though... A lil dolomitic lime couldn't hurt...

My guess is a low PH.