Leaf Tip Issues

Two types of problems on 2 diff plants. First leaf tips and blades are curling up and look almost burned or yellowish.

Second is more severe. Leaf ends curled down and almost dried up, these are some drastic curles.

Growing in 2Gl air pots, 600W MH light hung 34” from plant tops. Growing in Happy Frog. Not using Nutes yet.

Check your water, amounts given as well as pH youre getting a lock out. imo