So I’ve search and searched but I think this is early stage of nitrogen deficiency. I looked at the thread on here but the early stage picture will not show up. I have a sealed grow room running two 300w mars LED lights. The soil is FFOF. Plants have been in it for about 3 1/2- 4 weeks now. I have been feeding them straight ph balance water between 6.3-6.8 PH level. I’m guessing the nitrogen is running out that’s been in the soil? I have fox farm nutrients but I’m fixing to transplant them into 3 gallon smart pots. If it’s nitrogen deficiency would the transplant to fresh soil take care of this or should I just start giving them 1/4 strength nutrients? The plant with the yellowing at the top is the only one like that. Thank you in advance.