I believe Jardin is correct, but we do need a tad more info on what your parameters you're currently running. What's your RH and temp look like at the moment? I'm seeing environmental issues plaguing these little ones, but can't advise on treatment until we know the tent specs and environment.
What I can say, from what I see, is there is a high heat and low RH issue. This is warping your leaves, pitting them and making them very unhappy. This may be a simple case of heat/light stress.
Attempt to balance RH to 65%ish and temp to 25 degree Celsius so transpiration is constant and adequate at all times. I also see what looks like an overwatering issue that may also be the cause of these symptoms. They're very young and will be taking much of their water from the moisture in the air (humidity) through their leaves and too the root system. They don't need a tonne of water in soil until they hit the 2-3 week mark. Until then I use a spray bottle to keep moist but never do I fully water them. They will just drown, stunt, pick up deficiencies and all round be a hassle.
Just my two cents and I hope things start to work out a bit better. You have a strong root system, I can see by the strength of your stems. Your environment just needs a bit of tweaking so the foliar is happy too🙂
Much luck and happy grows this week. Drop me a line in PM if you need. Cheers man👊