Mate, them plants are ridled with N tox. You are in a heavy stat of nute lock. You need to hard flush, your leafs are so green and shiny and the droopy leafs with the signs of light green tips are signs of overwatering/feeding either too much or to often. You need to hard flush and restart your nute programme focus on PK lower your grow nutes or whatever has N in it. I'll look at what you are using. Good luck.