ok, be quite im goin rogue...

My beautiful flowers are in grave danger!!!! Good afternoon my fellow stoners. This is my first grow (applause) thank you, thank you. I have been flowering for a month now. My bloom nutes have N-1, P-4, K-7. Reservoir is PHed to 6.0 always. I start the week at 1450 ppm. As you can see in the pics below my lower leaves are contorting. The have dark dead spots on them and look waxy. This has only appeared on the lower branches and only on the oscillating fan side, hhmmmmmmm.... So what do you guys think? Should I just say fuck it and start growing tomatoes?

try lowering your ppm if in veg it seems high

do you still use nutes with nitrogen every other watering?. could be lack of that?

pretty sure you can mix 50/50 with 2 bottles of nutes, something like

50%. N-8, P-2, K-4 (mine at the moment)
50% N-1, P-4, K-7 (yours at the moment)

i'll be doing 50/50 mixes with mine when they start needing more P/K
.

You use 50/50 when flowering?

hard to believe flowering a 4 weeks on some of them but anyway-1400 PPMS is probably way too high for this strain. I would also lower my ph to 5.6-5.7. hydro really should not exceed 6.00. I would back off those ppm's as well.
Some of thos pics clearly show an Mg deficiency. Also the smallest one that looks the worst may have it bad-not too sure based on pics.

looking at your set up, are the roots contained in the rockwool cubes? or do they branch out in the tray? also is this drip or flood?

"hard to believe flowering a 4 weeks on some of them but anyway" <= what were you trying to say? The roots are 20"s long, there out in the tray. Its a flood system, twice a day.