Hey man. I would go with Sutragrow. This looks to me like they are just burning up rather than a defiency. I would cut back on the nutes. And do a straight flush. Run her on straight water for a few days. Or keep ppm real low like 200 to 400. See if you see any improvements. I would also triple check your ph. That is normally a really easy mistake to make. GOOD LUCK. STAY HIGH!!