The water should be just touching the bottom of the net pots and it should be FULL of bubbles.

I would just take a deep breath and do less. 1/2 nutes on your current schedule. Just give it a few days. If you don't see new growth in a week I would consider dropping them into some starter soil to see if they start up that way.

Just remember, whatever you do is going to take some time to affect the babies. So don't panic or over-help them. Time works wonders. Next time don't burn the babies force-feeding them steak dinner when they just want a little boob.