could be the start of nute lock
Doesnt look like a defiecency because of a lack of nutes in your water but rather due to nutrient lock. your leaves are pointing down ward. Youve fed them pretty hard havent you?
What are your temperatures?
I think its catching up and the flushes havent been enough with the proper water.
Your stems are turning purple just a bit I honestly believe you need to flush them well with some pure water ....distilled water
then feed them EASY they should pick right back up.
I'd be willing to bet your nutrients are locking up... whats your PH?
I actually posted all that stuff when the problemo was happening. I would go check right now just to letcha know but I got a house full of girlies for a slumber party my daughter is having.
I rarely fertilize and when I do its with Earth Juice Bloom right now. During veg I used grow. My soil is pretty much all organic except the perlite (I think that is chemically altered) I also occasionally add molasses with the water but that is rare.
I may flush them again today or tomorrow since initially I think thats what caused the problem was my chlorine filled tap water. I did not use water that had been sitting out just straight tap (kicking myself in the ass) but I didnt know how much damage that would do?!