youare asking for days nearly same questions,,,, or i wanna say the solution of the issues are always the same one... get acolder setup,,, and your plants look crazy fine
If its so hot, plants transpirate, the water evaporates, nutrients stay in the plant and react,,, and thats the effects.....
Its nowizard thing to change, only amatter of maybe 80 Dollar or less to get a quantumboard, the ts600 will do wonders here ( mars Hydro=)