Help!My seedling first leaves is yellowing!

lexterian

Well-Known Member
I have 4 seedling but 1 seedling ,out of the four,first 4 leaves are turning a bit yellow with yellow arteries.
The other 3 seedlings are fine.
I have them under 6 43w CFL and 2 4foot fluorescents.
Temps stay at 75F.
I have a fan on low.
watering when 2" of soil feels dry.
I mist them every twice a day.
What could be wrong with it?
 
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