What's the problem Doc?

Hi All,
I did check the FAQ page but as the images would not load against the plant problems I have no visual reference. My guess is that it is heat stress + nutrient burn as I have been spraying ALL the plants. Only the MK Ultra is showing signs of damage stress. I did have the lights off for 24-48 hours...the tops of the MK which I Fim'd stretched quite a bit which is good but I dont know if having the lights off caused the brown discoloration. The brown spots are slightly crispy to the touch so that is why I think it is some sort of burn. Im am using a mild strength hydro solution so I am a little puzzled by this. It'd be awesome to try & get some advice from the pros as to how I fix this.

By the way I am running 192 watts off of four large CFL's. The temps run steady at 81 degrees F. It is not hot in the grow box. Lights are an 1-2 inches above the plant canopy.

One flushes - to fix nutrient burn, ect for at least 1 week. It appears to be a "micro" issue (to much) . Are you sure it is not nutrient splash? (when watering you splash nutrients on the leaves. Or it could be enviormental (doubt that)

What size 400 or 600 watt CFL's?, your are correct about the height distance

She's definitely showing signs of heat stress from lights, what air flow you got going.

Thanks guys. Prob did get some nutes on her leaves when watering. I'll feed her plain water for a week. Fans: 2 x 10cm PC intakes & 2 x 10cm out lets up top. I wouldnt have thought heat stress possible under such a low intensity wattage. Maybe MK Ultra is a sensitive strain as the smaller Blue Cheese seem perfectly fine.

Harris Hawk: the CFLs are 48 watts a piece. They are big, measuring about 24cm long. They pump out about 70 lumens per watt.
Spliffbuddy: should I mount another PC 'quiet' fan inside the box for air circulation?

Does that mean that I've got too much light in such a confined space I.e 14,000 odd lumens? I was under the impression that you couldn't ever have enough. Or ideally 10,000 lumens per meter square of growing space...that is what I've schooled myself to believe as a universal truth.

thanks again for your help.

I emailed T.H Seeds direct as I am buggered if I can find any decent grow info on MK ULtra...maybe she is nutrient sensitive. If they respond I'll post it up for everyone's future reference.

Def nutrient splash on the leaves. Plant seems fine as the new growth is not affected.

I was just going to suggest that something was spilled on the leaves. so you have answered your own question.

I'd back the lights of a bit and get more air flow between canopy and lights if possible. If you cant do both back lights off def.