My plant is having trouble with fan leaves since I switched to 12/12 What is my problem? new leaves coming in are green but are curling under and die off too. I had gnats but that problem is resolved. I'm growing in promix, coco and perlite added to soil. LED is 450w and Is 24 inches above top of plant. I'll attach pic as soon as I figure out how to do that. I'm having problems with uploading pics.