whats wrong? maybe ph???

They don't look too bad. The ones in smaller pots need transplanting soon. They look good. If your humidity is 35% in veg i'd try and get it up to 50%. Good luck!

first off add some information and dont take the pics under that shitty purple light!! now second its not your ph..im honestly getting sick of having to explain this to people not your fault or anything just pisses me off that new growers get this taboo worry about ph because of the crappy info online..ok so ph in decent soiless material is balanced already, any decent nute line is ph balanced already, and your water no matter where it is from isnt going to be able to change the ph of the entire medium and your nutes..your fine! so many people cry ph when they dont know the answer that it seems to be the thing to do! you do need to repot those and id make sure its in some good soil as i have no idea of anything your using currently and the leaves i saw could be heat stress coupled with or not coupled with a low humidity or chem burn from pouring nutes onto the leaves..thats all i can tell from the pics i clicked on and im not clicking them all lol...add more info and a couple normal lit pics and ill be able to help you better,what water are you using? lights fans nutes etc!

Ddddaaaammmmmnnnnnn!!!!!!!!

Are you feeding them?