she looks ready for nutes, but dont overdo it!!! Looks to me like a ph problem. What is your ph feed in and water until runoff and check your ph of the runoff and post it and someone will get back to ya!! Post this in the live help thread as well and some one will be there for ya ASAP, but give ALL the details of ALL your controlables!!(lights, medium, temps, ph in and out, ect.) This helps with a better diagnosis.