Seedling - Small spots on leaves

Dee Muney

Well-Known Member
Can anyone help me identifiy what might be causing these small spot discoloration on the leaves. This is a 3 day old Karma Genetics Cookie crash seedling that was under a small 25 watt LED only about 5 inches away. Could this have been some sort of light bleaching or nutrient defiency? They are in happy frog soil and have just received PH'd RO water. I feel like they are too young to be showing nutrient defeciancy. I know its hard to tell in the pic but there is some small spotting starting to appear towards the center of the outer part of the leaves. Only 1 out of 6 seedling is showing this however it is the largest out of the 6 seedlings.
 

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