leaves curling down and yellowing plz help

i am growing great white shark in coco.they are into the third week of veg and are being fed on monkey juice(my ec meter reads 1.3 and p.h @ 6.0),leaves are curling down and feel a bit crispy,i dont think its a problem with heat as my light is a good distance away,(temp between 50-70) some of them are starting to yellow around the edges.ive recently bought a dehumidifier as it was getting up to 95%rh at some points,any ideas? help would be much appreciated thx

The one leaf looks like a burn from nurturance. But the other one looks like it could be from the humidity. Plants that small need vary little food, despite popular belief on the threads. Now I'm sure I don’t have to tell you this at all, but I keep my food when veg around 400 ppm in the dirt and only feed every 3 watering. So that’s just my opinion
-good luck

cheers for the msg pal I will lower my feed,when u say you feed at 400ppm does this mean your e.c meter reads 0.4 where as ive got mine at 1.3?? my dehumidifier has got the humidity down to 50% do u think this will help.cheers pal

they look heat stessed , how often do u water? my plants thrive in 95% humidity no joke.