Seedlings has white hairs on day 4?

Hello everyone I'm new to the forum. I hope someone has experience with this.
I'm growing indoor with coco. Out of my dozens of seedlings, 4 blue dream seedlings have white hairs on the tips of the leaves. They sprouted 4 days ago. Ive had them under a led/hps mix thats low par for 19on/5off.
These white looking hairs are coming from the leaves tips.
Here is a pic:
spynmh.jpg
 
It's a deformity of the leaf tips. Did you flush your coco or precharge it?
I used a new bag of high quality washed coco, and used Zeus Juice by nectar for the gods used as a germination aid, softening the seed coat and providing nutrients for the first stages of life.
 
IMO a seedling needs nothing but water until the cotyledon start to fade/curl.

Stop feeding, it might recover.

That whole cotyledons fading and stuff... Never got it. Mine are usually green weeks into veg and I usually trim them off when I pop the bottom.

That said, I'm not disagreeing with you about using them as a gauge. Just saying.
 
That whole cotyledons fading and stuff... Never got it. Mine are usually green weeks into veg and I usually trim them off when I pop the bottom.

That said, I'm not disagreeing with you about using them as a gauge. Just saying.
Not a problem.
Some seedlings can handle nutes early, some can't (like the OP's pic)
This wee one was just fed (1/4 strength) for the first time.
IMGP6423.JPG
 
I've had cotyleons turn yellow as early as week 2 of veg, and I've had them remain green for nearly an entire grow...never really did understand why.
 
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