HELP! Seedlings first leaves are yellowing on all three plants

[nerdboy]

Any help would be greatly appreciated. I'm a new grower, this is number 2. I'm using coco perlite mix in an octopot, have three plants going at once, Ph is 6 going in measured 6.5 at the res, using seedling strength 1/5th strength general hydro trio, with calimagic per nebula's recipe. Humidity is 45-55 in the room. First picture had a dome on it for a while. All three are showing similar signs. Two are under max sun PB2000 at about 30 inches. They were sprouted in rapid rooter and transplanted into octopots about a week ago.

Anyone have any ideas?

 

[SoOrbudgal]

Photo or auto flower ? I don't know your light what's the actual draw from the wall? Could be splash of something on the leaves burned them with the light is it too close? I can only say that the leaf looks cooked how old are they?

 

[nerdboy]

The seedlings are about two weeks old at this point. The lights are 600w LED at about 30 inches. Could it be nutrient burn? I was using the coco schedule that I found on GWE. They are Photo Super Skunk Kush. from Garden of Green.

 

[CaptainWiese91]

PH range in coco is 5,5-6,5 so you are in the higher side of the Ph range. Try to lower the Ph down a little bit.
and maybe try a lower ratio of NPK - they look a little nute burned to me also

 

[SoOrbudgal]

Yes i'd back off the feed and raise the light for now until they recover just water should see green up. Good luck keep us posted.