Help!!** new grower and NEED ADVICE FAST!!!!

So I have 4 plants going under a 1000watt hps light in the Vegetation stage. The strains being grown are AK47, grandaddyak, Gods Gift, and Girl Scout Cookies. I am using Advanced neutrients line with senzym, Sensei Grow, Nirvana, Big Bud, Ancient Earth, Bud Candy. I notice the new growth comes in and saw the leaves like this barely. What does it mean for the fan leaves to curl at the end? Also what's the dis coloration?! Please help me!!

I would add the full Fox Farm nutrient line up, Jacks 20-20-20, guano, blood meal, and a splash of molasses.

Just kidding, no need to be giving them that much stuff. The downward claws on leaf tips is your plant telling you she is starting to get overfed and you need to let up.

i think bug is right. i see tip burn...

Yep, overfeeding and possibly a little overwatering. How close is that 1000W to the plants? Optimal distance is 10". Also, invest in a bottle of Cal/Mag, you're gonna need it sooner or later.

Ya definitely let the soil dry out completely, then flush the crap out of it, then let it dry out. then flush the crap out of it again...