What's up with my seedlings?

First time growing from seed and I'm wondering what's up with my seedlings. They are 2 weeks old and the tips are curling a bit (looks like a claw) and yellowing a bit.

I'm growing dtw, coco+perlite using dyna gro nutes. My humidity fluctuates a bit. I keep it around 40-60% most the time, but if my humidifier runs out, it has gotten as low as 23%,but only for a couple hours.

I fed 2 days ago with foliage pro only at 340 ppm, the pH was 5.6.

Temps are 80-75 during lights on and 75-68 during lights off.

Using a 600 watt mh with a blockbuster in a 4x4 tent, hood is 35" from plants.

Whats going on? I think pH, because I get mixed answers from literally everyone on what coco should be, so I went with 5.6.

But maybe the humidity flux? Or maybe 340ppm is too much for 2 weeks old seedling?

Thanks

They look good besides the fact that the water that is collecting on the leaves is motating down to the tips and is messing them up under the lights. Keep the leaves dry and it will stop that and prevent p.m and a host of other shit you dont want.

I wouldnt start feeding a seeding till week 3 aleast

Custom420 said:

I wouldnt start feeding a seeding till week 3 aleast

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You don't feed till the original 2 leaf's start turning yellow. They use the energy in those leaf's first once they start yellowing or degrading then time to feed