na bro you dont wana use rockwool with aero the rockwool will stay too wet. once you get roots you use neoprene collars to provide support for the plant, check out stinkbuds thread for example
You can drill holes in the bottom of the bucket, since perlite doesn't retain very much water do a drip system like if you were using a hydroton drip system. Recirculating or run to waste, its your choice. Also experiment with flow rate and watering schedules (ex. if you are all perlite perhaps...
Its nitrogen deficiency because you haven't fed them yet. They've needed nutes for a while now. Keep em' around 600 ppm or 1.1 EC and they will recover in a few days.