Watering 200 ml every 2 days, 2 waterings with fertilizer, 1 watering with pH 6 water.
It seems they are growing with some really ugly leaves, I don't know what the reason could be.
If you growing in biobizz lightmix that's an hot soil for seedlings. Had the same exact issue in the past. Pick a less fertilized soil for germination. Check the ec levels in the back of the soil's bag.