I need help my plants are showing some imperfections on the leafs, temps around 72-77 no higher, humidity is roughly 45-50 I have been using advanced nutrients sensi grow two part solution and following instructions, last 2 waters have been 1L each plant with one watering being 330 ppm nutes and the last one was 5 days after that one coming in at 600 ppm nutes ph is at 6.4 we are on day 23
Run off is around 5.8 - 5.8 and 550 ppm please help