What do i

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At first glance, it looks like nutrient burn on the tips. It doesn't really look too bad. Back off the strength of your feed by 25% to 50%.

What are grow medium, nutes, feed/water sched, ppm/ec, pH, temps, RH, light specs and height? More info is better.

Running Rockwool, hand feed advanced nutrients full line up full strength. With led lights About 2 ft from canopy Water everyday . Don’t know ppm or ec . Ph 6.5 -6.7 temps low 80s 40-60 humidity.

I don't use that nutrient line, but if it's like the others, full strength is a little too strong. You get burned tips, and nutrient lockout which presents itself as a deficiency of the locked out nutrient(s). Back off the strength by at least 25%.

Pick up a TDS meter to measure ppm, they're pretty cheap. When I'm in full veg/flower mode, I try to be right around 1000ppm to 1100ppm, and that's at about 50% to 60% of full strength using tap water that comes out at 200ish ppm.

Good luck! Peace

Ya back of the nutes to 1/4 or half strength