yellowing leaves for new grower

mojomama here having problems with one of my plants the plant is Agent Orange we used vermafire potting soil, dyna gro nutrients undier a 1,000 watt lighting system. I have 8 plants in veg they are all different strains, and this is the only one that is looking poorly. The plant was obtained as a clone, they used a rockwool medium, and placed into soil the first week of January. The problem is the leaf tips are yellowing, a few have turned brown and curled. Any tips for this very sad plant