My first grow Super Lemon Haze SLH

heres a video of the room and new setup


http://www.youtube.com/watch?v=10Fhf8HeKoo

heres a video of the room and new setup


http://www.youtube.com/watch?v=10Fhf8HeKoo

on one of the kush plants the leaves are turning brown from the top of the plant and from the inside of the leaves outwards. they start to fade in colour first and then yellow to brown. i flushed the plant twice already seems to have gotten better any ideas why this happens??
and the plant is getting the exact same feed as everything else why is this only happening to this one?

As promised HQ pictures.
The crystals are unbelievable



Have bit of a problem, i know that once the trichomes go cloudy its time to harvest. I haven't got a Loupe but on the kush 50%of hairs are gone brown and some of the hairs are starting to turn brown on the SLH, isnt it too early?? still another 4 weeks to go.......