Been a minute since I did any growing of my own, but your soil mix is pretty hot for seedlings. Those pictures look more like nutrient burn to me. I generally didn't use any fertilizers at all until the plant showed signs of needing it. Once the root systems became more established, then I began to start adding more nutrients to the soil itself.
Mr. Clandestine Reviewed by Mr. Clandestine on . Does this look healthy? Holy Grail Kush Strain Grown from seed Just got the one seedling growing right now, which I will sex and clone later Running lights 24/7 Fan blowing on plant/lights on low setting Problem 1: Seedling had just the two sprout leaves and two true leaves when I got the first problem. The leaves were yellowing. I stopped watering it so much (I think I was over-watering) and I moved the 6500k cfls further away. The cfls used to be 1/2" away, but now they are 4" away. The yellowing appears Rating: 5