A Little Info? "i see spots"

I am noticing dark brown to rust colored deformations on the first set of sun leaves, Temp, Nute burn, Co2, Defencies, There is just too much info out there, tryin to keep this simple. heres what ive got:

Hydroponic Setup-1 plant
•25"x18"x48" reflective area.(poly shield)
•150w. HPS 2300k
13.3w 450nm/6700k LED
•71/82 deg. @ plant level(10" from HPS)
•Active drip system- modified spray
160g.p.h.~ 1/8" ~3x360deg. spray
nozzle @ 13g.p.h./260g.p.d. through
3 cups Hydrorok media into 6" basket
•5 gal. resivor at 68-71 deg. with a 3" airstone.
•pH of res. 5.5-6.0/R.O. supply water @ pH6.8-6.9
•General Hydroponics. Flora Micro/Flora Bloom.
•Distribution Lucas formula;
"0.5 conversion, low light."
• 0-21-42ml. seedlings: Lighting 20/4 (3wk.) =475ppm
• 0-25-50ml. Vegetative: Lighting 18/6 (>1 ft. Tall)
• 0-40-80ml. Flowering: Lighting 12/12 (10-12wk.)
Formula, x= TDS of new solution
(x-TDS)/x)*x*5
(y/x)*x*5=z
z*x*5= _ml. Flora Micro,
Double Micro to get _ml. for Flora Bloom



•Dump reservoir once replaced 5gal. pH adjusted water.
•Replace 5gal. Fresh 100% solution
CO2 is delivered via 3gal sucrose solution/yeast=???ppm

!!!lets C What happens!!!