So this is my first grow, and I am quite pleased with it. However, one of my plants leaves suddenly started curling up( like a taco ), and drying out. heres a picture of it Uploaded with ImageShack.usI have been giving them distilled water throughout the whole cycle, fox farms soil and nutes, 24 hr lighting, 75-77 degrees, 45-55% humidity. I thought it might be because of nute burn, but i dont understand how only one plant would get affected? Please help!!