i'm no expert bro but i agree with Greenthing, that first set of pics just looked
a bit hungry.

now it looks like nute burn as syde00 suggested.

unfortunately, i'm not experienced enough to give you a definitive answer.

so i'd suggest you fill out the troubleshooting form located in Greenthing's sig.

then, hopefully, Rusty or Stinky or Stitch or one of the other more experienced
growers will be able to more definitively answer your question.
justanotherbozo Reviewed by justanotherbozo on . NITROGEN DEFICIENCY ?? Would everyone agree that these young plants are showing signs of N deficiency ? They are about a month old from clone, only been in DWC for 4 days under 600w HPS, PH fine (5.8) room temp 27c, nute temp 20c, good air circulation. They only started to yellow last night. Rating: 5