Trying to get a handle on this problem before it gets worse. Had been over fert for about a week, went back to pure RO Water for a week and now back to ferts at or below recommended amount(s). Schultz Orchid Bloom being used, all others doing great...150w HPS in Cooling hood, see earlier pics, avg temps 85-89 during light period (12/12). Most everything else about the growing setup as well as plant info is in the many threads & posts precreeding this one. Any answers would be greatly appreciated.