Heat or nutrient burn future#1

When leaves curl up it tends to be heat stress. When the small tips get a bit yellow and then crispy tends to be overfeeding. Give them a little TLC and you'll be good. Good Luck!

Very hard to see fine details under grow lights, but what I can see looks more like damage caused by the leaves touching the substrate, most likely at night when the leaves are lowered. Photos taken under normal light are far better to look at and see properly.

Make sure you ph your water at 5.8 for veg, check everyday. Feed chart for photos. Day their born, 400 ppm, 0.8 ec. See good growth that week up to 500 ppm, 1.0 ec. Next week and you see good growth, 600ppm 1.2ec Every week you increase 100 ppm if your seeing good growth. If your not seeing good growth then stay with that amount an extra week. Stop increasing when hit 800 ppm, 1.6 ec. Only give more if you see they really need. Soilless recovers or goes bad very quickly. Keep parameters in order and they will recover rather quickly. If their autos start at 200 ppm from sprout and work your way to 600 to 650 ppm.