urgent not sure what wrong but something aint right

[pistol pete]

das plant.jpg



so im kinda new had one grow before but didnt have these issues.the run down.


fox farms soil
170 watts cfl
fox farms big bloom/tiger bloom ferts
about 4 weeks into flowering hoping it doesnt ruin her { il nino } is the strain


any suggestions already flushed a few days ago

its only on the fan leaves too if that helps some curl up and some curl down i keep the light
2 to 3 inches away and heat never gets or 81 at night and 72 at night

[greenthumb951]

its some type of nute deficiency..maybe phosphorus (i think thats the right "p" word) or magnesium deficiency..