AK47 seedling/brown spots

hi everyone.. first grow from seeds.. Day 17.. first set of leaves showing some brown spots.. anything to worry about?

thanks in advance!

hey how fast did you put ur seedlings after grem into the dwc

moved to dwc about a week after germ.. when cotyledons began to unfold
(3x AK47 regular seeds and 1x Blue Thai feminized)

by the way, figured out the browning on leaves.. definitely nute burn.
i had read some instructions incorrectly..

but i'm fully aware now... no nutes till vegging! changed to new 5.8 ph'd water and flushed each plant. all 3x AK47 seedlings got nute burned pretty badly (pic1).. however they are recovering and the new growth is looking green & yummy again (pic2)

luckily.. the Blue Thai feminized has only suffered slight burns and seems to be handling the situation much better than the AKs.. go figure.. err i meant.. GROW BLUE THAI GROW!! (pic3)

Way too stressed way too early. Start over.