Ph stays at 6.2 I just like those digets and I get it there every time... before I flush ppm was at 2800ppm lol but like I said I just flushed them to 750 ppm with a 6.0 ph from run offIf its all around the leaf margins and not just the very tips then its likely a potassium deficiency. Usually caused by a low pH.
Do u have pics? It would help.....Okay so I'm in week 4 of flower everything is looking great but my leaves is starting to show some burns on edges of leaves so I flushed to 750 ppm is that right