Yong leaves changing color

Nitrogen toxicity caused magnesium issues, plus from curliness i think your watering regime is wrong, aka you water while plant is still wet ...

My biggest mistake always, is jacking with everything way too much. Nutrients being something I just leave alone. Less is more than enough (usually:) Your plant is full. Just phd water for day or so. Then start slow and progress into a bloom feed. Also, very easy to neglect ph. 5.8 - 6.0 ,in hydro, is where I get some good results Careful with lights and you should be good to go. Good luck!

Your pH is much too high and your plant can't get at the nutrients it needs - in this case potassium.... You've got to get the pH down to between 6.0 and 6.5 - 6.2 would be perfect... Your lights are also, I think, much too close ... pull them up if you can.. if you can't do some LST on the tallest branches to gently pull them away from the light. Good luck...