Nutrients too high? Or Possible mg deficiency? I'm running a two bucket rdwc with a third bucket as an extra res. My ph is around 6.5ish I'm using strips. My ppm pen shows around 550. Growing from seed. Any help is appreciated. Thanks Sent from my SAMSUNG-SGH-I337 using Grasscity Forum mobile app
Without seeing a photo of the whole plant its hard to diagnose. To me it looks like a symptom of an old problem and the damaged leaf if now dieing off. Is your ppm figure rising or falling day by day?