Looks like a ph issue to me. And cman is right.....it's all guesses without good info.
Any chance for some decent photos without the hps light?
Weedhound Reviewed by Weedhound on . what...is...happening? Ok I'll try to help as much as I can with info. Two girls: Tegan and Sara from cheap mexican schwag bagseeds Hydro, ebb/flow, 15 min flood every 2 hrs, aqua A&B, NPK 0-13-14 flowering 1000W HPS cool tube, 6" planters with hydroton clay pellets They will finish their third week of flowering tomorrow. Tegan has always been well and robust, but Sara looks like she is definitely hurting. Her flowers and most of her leaves have a very distinctive curling at the ends, the tips are brittle and Rating: 5