I think its the roots!

[dankster11]

Ph around 6.5
2 cfls... i think i nut burned it and the routs didnt catch in its new setting.. what u guys think? sucks cus it was my biggest plant

[konvikt419]

you really need to give more info before anyone can try to help fill out the troubleshooting sticky in plant problems

[stinkyattic]

Also sniff the block and if it smells funky/rotten/swampy/ammonia, post that up too.

[LuciferN]

Here is the link to the troubleshooting form (http://boards.cannabis.com/plant-problems/127058-troubleshooting-form-yay-you-know-you-wanted-one.html)!

[HARDDON]

Sick sick pant.

Over nuted and the blotches on the leaves signal over watering.