I have similar problem without the leaf curling after changing from fls to 400w hps.Not had any replies,so i am still in limbo.
Good luck with the grow.
400w hps swiss cheese soil grow using biocanna bio flores/should be for flowering,but worked well on last grow.She is 5 weeks veg/good air intake/extraction. Temps 77f-80f.Is it lack of nutes or could it bee cold air intake when light is off.Quality of pics not good.Would appreciate all input.ty
400w hps swiss cheese grow using biocanna bio flores.2.5 -2.0 -5.0/ should be for flowering ,but work well on last grow.Good intake /extraction.Is it lack of nutes or cold air intake when light is off. Quality of pics not good.Would appreciate all opinions and solutions.TY