It sounds like you are over watering and the roots need some air. I would say do one flood for 15 minutes every hour and see if the plants perk up. If not, increase the time by the hour until they do. Do it over the course of the next few days and see what happens. The roots definitely need to breathe.
dejayou30 Reviewed by dejayou30 on . OVERWATERING IN EBB AND FLOW Hope you have advice or can offer assistance: 2 x 1000 mh & 1 x 1000hps 1 week in veg flood table water on 24/7 humidity - 35-50% temps 25-30 degrees celcius (77F) lights above canopy 2 feet or so Gen HP - 900 ppm / ph 6 Rating: 5