Dead spots on leaves

I use green planet duel fuel 1 and 2 and all there additivs pro cal massive resin liquid weight and pk and follow there feed chart I use mammoth p also temp is 27 max usually 25 and Rh is around 60 some times goes up to 70 but only been that hight a couple time over couple weeks to lower the nitrogen should I lower the dose of duel fuel 1 and 2 there pretty much the only thing that have high nitrogen

Leaves look really green. Too much nitrogen. You shouldn't have high nitrogen during flower. I'm not up on EC as a measurement. I'm old school and go by ppm, but i think 2.4 EC is a bit high, no? Ahh i looked it up it's 1200ppm which is good. Your plants look hot the way they are curling on the edges It's hard to diagnose, or narrow down a leaf issue when you don't provide all your info. What fertilizer are you using? Whats your temps and RH? I'll bet your VPD is high. I would flush your soil because those leaves are pretty dark green. You also have leaf tip burn. I would check your nutrients cuz your buds are small and your leaves are dark green which to me screams too much nitrogen.

Looks like burning due to excessive feeding to me.