Hello. I have started my first grow couple weeks ago and most of the plants are at 4th set of leaves at the time. I have a problem 8/9 of plants have yellow cotyledons and some of the plants have their single finger leaves turning yellow and drooping with little yellow spots in them, I know cotyledons and single fingers sometimes turn yellow and fall off but this early? I think it could be nitrogen deficiency as I started them in seedling soil which is pretty neutral stuff, I don't know specs as I got rid of the bag. Problems started coming as I transplanted them in 10L containers 4 days ago which now has pretty hot soil in it. Could it be that my seedlings have used all nutes from the seed and what probably was in seedling soil, and they don't get nutes yet from new soil? Also 1 strange thing is that one of the plants has formed taco like leaves even though they all are at same height, any ideas about that too? Any help would be very appreciated. Let me know if you misunderstood something so I can try to explain it as English isn't my first language.