I see no problem assmatic,the seedling look's fine ,the first few leaves to come through sometimes do tip curl this can be caused by either too high nutes or too low,or the fan is a little too strong on the seedling,its causing wind burn.
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Put them on a feed of 1.1 ec for a week or so and have the llight has close has possible with out burning the seedling,but it looks like you are doing ok don't go doing something stupid ,that may cause more problems it looks a little light that is why i sau 1.1 for a week then 1.2 week two
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hope this helps tyke
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