Storkanswered grow question 2 years ago It's a nut burn, not potassium, calcium, or magnesium because ur leave are clean and dark green if you had these 3 your leaves be yellow with dots and curve up with crispy tips and edges so lowering EC by 0,2 till is time to use flawless finisher is perfect btw make sure water is not more then 150 ppm 0,2 EC while u flush