In a new hydroponic system these seedlings were recently transferred from an incubator, each is showing a different symptom, yellowing and edges burn, not sure what the problem is?!
Water temperature is 20c pH is 5.5 and the 1100w led lighting is about 4 foot above the seedlings.
Please help! 2 previous attempts had almost similar results, one seedling remained as a seedling for months before dying last time!