She looks to be just overall hungry to me. What feed and feeding schedule are you using? pH will normally be a little lower when wet, and higher when dry. I use Promix and precharge the Promix with 300-400 ppm of grow nutes. I increase my nute levels a little each week thereafter until cleansing in the end. I add AlS to give my Promix an initial pH of 6.8. All my feeds go in at 6.3. After feeding, the pH drops to around 6.3, as as the medium dries out, the pH slowly raises back up to 6.8. This works great for me, as through the process of the pH fluxing in that range, you get accessibility to all needed nutes at one time or another. You didn't mention you lighting system, but LED's seem to encourage Ca/Mg deficiency. I add Ca/Mg routinely to my plants starting at about the time the stretch is coming to an end.
