Yellow spots on seedlings leaf

Extracore69

New Member
Hello,

i'm just doing my very first grow and i have a question regarding one of my seedlings.
I have 4 plants under a 250 HPS, temperatures about 25-28 C° (78F). The lamp is 50 cm-s (1,5 feets) above the seedlings (5 days since they came out of the soil - plagron light mix-). They only get ph-d tap water. Today i noticed some tiny yellow spots on one of the seedlings leafs and i don't really know if i should be worried or not...

I would be happy about your opinions!
Thank you!
 

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