Curlin leaves and spots omg what now??

ok im in 6th week of veg with some importanat clones i only have one shot with these babies and i am having some probs i have noticed the leaves to be curling down at tips and up on edges and i have also noticed these brown areas i believed it was because of misting but i seem to be finding new spots seince i stopped misting the leaves on my plnt seem to be dark green and dry like papper what do i doo plz help m8s.

so i flushed the soil of my four plants that seem to be curling i checked ph of the runoff and it was perfect the leaves seem to be really dark green almost a blackish green with a waxy apperance the over all heath of the plant looks fine its just scraggaly and seems like its lacking something

did you test the ppm of the run off,and what are you useing for nutes,and what is your water quality,need more info.

i dont have a ppm meter but im using a metanatural 3 part feeding sys.
which consists of a bloom 1-5-5
veg/nitrogen 16-0-0
base 3-3-3
then i also ad i tsp of hygrozyme and b1 thrivealive and a few drops per gal of super thrive this iall organic mixtures i am to believe my ph lvs are spot on aswell