I'm not a big fan of giving any nutes (or additives, or vitamins) till you have roots that can do something with 'em. It's a waste, and burns the exposed plant tissue trying to pump-out the roots for ya.

Would raise the lights a tad, as foliar growth isn't the goal...root development is. You'll want just enough light for photosynthesis to continue, but at a much slower pace. And try misting the dome, (the inside) rather than misting the plants. You want them humid...not wet.