AmnZhzanswered grow question 3 years ago Hi mate, checked your diary and saw you do pure hydro. Have you checked your reservoir, how are things inside there? I used to do pure hydro system but due to high temps where I live, most of the times I got root rot. Always when I had problems that looked like several deficiencies finally it was root rot. Hope its not, check your water and roots for brown slime. If thats not the case and everything is as it should be, change your reservoir with a light feeding mix at right ph range for 2 - 3 days.