From what i learn. if u gotta set the ebb and flow on a timer and flood it every 3 or 6 hour denping on your medium. i see that u got plants that wus to b in dirt and now in HYDRO. that the same problem i had with the starberry cought. is because of all that dirt and shit that in the rockwool that making your PH jump up hella high. so take your plant and make sum 5.5 water and PH down and let it soak for a lil. the yellow on your plant is sign of PH level unbalance. i just top my water with 5.5 water and ph down. and it will even out the ph or lower it. good luck.