so when is the normal drooping time? when and how do you water? what kind of water.city,well r/o? a little drooping here or there can be normal sounds like air and co2 is not your problem. they will droop if they are thirsty and if you water at the same time every day or every other they might be telling you to give em more water.
They begin drooping after about 14-15 hours of light and get progressively worse until the lights go out. They always look great in the morning.
I water as needed, about every 3 days. I use RO water and add nutrients every 3rd watering.
They droop in the evening on watering days, in the evening after they haven't been watered for 5 days (They actually began drooping much earlier on this day.), and every day in between. I am confident that the issue is not cause by over/under watering.
I watered them yesterday with nutrients and raised my light this morning when my girls woke up, about 7 hours ago. They seem to be drooping slightly already, much earlier than usual. I will let them go on this way for about 4 more hours and check back. I will try to provide pictures this evening when I give my final results on raising the light.
-GNS
This is what the drooping looks like. This is during the day and they usually look a little better than this. Th
ey are a little worse at night. I have 1 plant that looks great, 5 others which are sad. Maybe it is overwatering? I don't water every day. 
When pot feels light I water. Maybe I should let the pot get even lighter. Until it's bone dry. Again, any help would be greatly appreciated.
Just curious as to whether everything was fine and it was just sleepy time for the ladies..