yeah if you have hydroton, don't even bother with the rockwool. if you haven't already, add some hydrogen peroxide to the res, and if you can, a powerhead, or some airstones. good luck next time. you are growing more than one right? I would recommend to grow more than one. once you have a good mom plant, it should be smooth sailing. also start out with 1/8th nutes, then work your way up to 1/4 after a few weeks, then work your way up to 1/2 strength, and you can stay there during veg, to flower, and until harvest.