I'm in week 3 of mid bloom using GH Flora nutes, floralicious + and Hydroguard. Using DWC hydro. Ph had been dropping but is 6 now. Never got below 5+. I started seeing this a few days ago. Looked like the veins were turning gold. 1st pic shows location. It has now spread to secound plant. Thought it might be wind burn. Now looks like cal defeciency? I had bought a crap TDS meter so I have to order a good one. No idea of ppm values. Only have about 4 weeks left on this Waikiki Queen, gotta get it right. Nutes have been great till this. Using GH generated feeding chart. Will add more pics from another computer.