I'm a soil grower and..... that does not look like soil.Not a soil grower but to me that soil looks too compact and dry.
If you are watering a tiny seedling that often that is a big part of your problem. Unless you are growing in an oven a seedling like that probably only needs SOME water every 5 days or so.yea i did not water her in a day so the soil is dry and i did not give her no nute yet but i just got done watering her