Those are some funky leaves.
I wouldnt be giving nutrients to it this early, and I dont think its an airflow issue, and I dont think heat is an issue either unless the T8s are right ontop of them, but even still, if you had to pinch them back to keep them from stretching, thats usually an indication the light is either too far away, or is not intense enough.
Most issues come down to something as simple as the pH of the water youre using, and some of the leaves appear to have have early chlorosis. Do you pH your water? Since its such a baby plant, I am more inclined to say your issue is purely pH based. I would check the pH before getting crazy with trying to fix with adding nutrients. I think your plant has just locked out the nutrients already in the medium as opposed to already used them all up as a result of the pH being off.