Step-back from the plant, and let the little darling do her thing. If you don't develop some patience, you'll kill your plants with overcare. (and give yourself a coronary in the process) But next time, grow them in appropriate pots. A 3 gallon pot is waaaaay too big for seedlings.
A general rule of thumb for seedlings, clones and young plants: if the leaves overgrow the edge of the rim, time to start thinking transplant. Transplanting is much less stressful to the plants than the abuse they see in oversize pots.

No nutrients till they're showing their 4th or 5th internode. Only then do you start with half-doses of nutrients.

Acclimate the seedlings to the MH light. (raise the lights so you don't over-do the heat and light) Slowly (one day at a time) lower the lights to recommended distance after a couple of days.