Anyone knows what this is?

gemzzz

Member
strain is amnesia haze RQS autoflower, biobizz lightmix soil, cfl tubes, haven't used any nutes yet. seedling from lights are about 25cm.

so what the hell are these brownish streaks on them new baby leaves?
my other two seedlings dont have it
is this a serious problem?
thanks for any answers.
 

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