True leaves turing yellow?

W33D

Well-Known Member
Ok, I've got about 7 seedlings going, about 1-2 weeks old give or take. And 5/7 the true leaves are yellowing, as if a nitrogen def. I've never had this problem before this early on in the seedling stage. Any ideas? Oh yeah, their on 24/0 under 2 4foot 34w fluorescent tubes.
 
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