2nd week flower and started to droop

As far as I can see from pics and diary info is that everything seems to be ok. Except for the daily watering level, those symptoms of slight wiltering on top is only familiar to me from when I have over watered (or if subjected to extreme heat and humidity for extended time, but according to your diary that's NOT the case here). Let them dry out a few days, don't water any more until the pot is very light weight n she's dried out, then wait 2 more days before you give her merely 200ml, then slowly increase. Let the plant tell you how she feels and wait to see how she respond to different changes. This has worked for me in the past when I experienced similar symptoms. Most importantly is to never panic, it's a living organism, some days we feel great and look great, some days we don't.

Are you really watering with half a gallon of water every day? That could be too much and eventually leads to root rot. Damaged root can not take in water and nutes. First wilt, then yellow tips, then curled plant. Pick up the pot to feel the weight. If it is heaby you are in trouble. Stop feeding her and let the soil dry out a bit. NL Auto should be fine if the soil is dry for three or four days.

Wish I could say, that purple really makes it difficult. I assume that is an intake near the plant? Al I could point to is that is a lot of nuets you are using, but that may be fine. Wish I could say more, can you get white light pics?