It's been 3 weeks with no progress at all and i have done this before so i have no idea what the problem could be. The roots aren't growing as they use to almost hasn't make any progress. As you can see in the picture weeds are turning yellow. I am not over watering or over feeding so what can be causing this problem? also im doing 18 hours of light and 6 of sleep, im feeding them with the same food that i have been using to feed it my previous times. Please post and ask questions ill be reply as soon as i can and thanks a lot for your help.
http://puu.sh/PeOR
See picture above ^
http://puu.sh/PeOR
See picture above ^