Help Please!!! 1 month flowering and my problems are getting worse and cant figure it

hey rollitup guys and girls i need your help its been about a month since my last help i needed and i lost my internet so i could not keep anyone posted!. Myproblems started going away and for about 2.5 weeks it has come back worse!. People have told me it n diff, Mag Diff, and i tried to fix both of those with no sucess! I have not to much time to fix this and they look soo nice and have great potential! Please Help!!!! Thanks Again 420kid

no one can help??? .....+ rep for good info

what size pots? could possibly be getting rootbound?

The last pic looks pretty good. Just keep the feed in moderation and you should harvest some buds.

I would use plain water for a couple rotations and then go back to the nutes...give it a break for a short time...but don't over water...let it dry out in between watering...g/l

The plant looks like a good healthy size and it will demand lots of frets right about now. Here is the thing that pops right into my mind, plants will pull from larger fan leaves first. they will become more pale in color and depending on if its a micro or macro fret it will display differently on your plant. Example, instead of going pale green for a possable low N some signs on fan leaves will mimic fret burn or lock out but its really not. I would simply give your plants a decent feed, not to strong tho.What damage is done is done. U cant do nothing about it, infact it might look like its getting worse cuz of the way the damage leaves will continue to look but thats them dieing off. Look for new growth and bud development. Also give a Vitamax feed. If u are using Cal/mag supplament, which might not be a bad idea, mix that first into your water for many reason. One it helps balance ph in water so when u mix your feed it does not go all wonky! etc.
One posted mentioned root bound, thats a given! your plants in need of some feed in my opinion. Just make sure everythign your giving them is ph Adjusted.