brown spots and deadspots on leaves

Well This problem has been here for awhile, but now it seems to be getting serious. Misterious brown spots have been appearing on the leaves of my plants. They start off as a rusty copper spot, and now they are killing the leaves.

Temps are 82F
PH is 6.7
The brown spots are near the bottom 3 inches of my 9 inch plants
I have been giving a very weak mix of MG 12 4 7 nutes every week.
Im using 14 14 14 miracle grow soil and 6500K CFL.s

Here are some close up pics of the problems

[img=http://img27.picoodle.com/img/img27/9/9/23/f_IMG0398m_4266185.jpg]

[img=http://img35.picoodle.com/img/img35/9/9/23/f_IMG0399m_ccf05a6.jpg]

[img=http://img34.picoodle.com/img/img34/9/9/23/f_IMG04002m_f718aea.jpg]

heres a picture of my grow setup for a better idea of what it looks like

http://img38.picoodle.com/img/img38/...1m_68b18bb.jpg

So far the problem is only on the bottom 3rd but im worried it will creep up to the top of the plant

your soil is too hot,your leaf damage is common with MG soils and your adding ferts

IMO ...transplant to better soil