I don't think the top pebbles should be wet, my water is about an inch away from them bottom of my pots and the whole pot below the surface is getting wet. I did add nutes before I transferred them into this bigger res, hopefully they take off in a few days now the water is fresh and more light was added.
The plants will not improve but the nutrient burn should stop progressing. When you re-introduce nutrients start at 1/4 strength at most and increase slowly from there. I would recommend not starting nutrients until she is about 3 weeks old or so.