So they are a month old today. Something a bit strange is happening and I'm not sure if I should worry or not. They seem to be remarkably droopy in the evenings a few hours before their light goes out. A couple hours after they "wake up" in the morning they seem more perky. Is this normal?

One of them, probably the biggest one, seems to take it the hardest, really droopy. Her leaves are also a lighter green than the others with some yellowing of the lower leaves. Thinking this is a Nitrogen deficiency I gave her a tiny dose of nutes, like a small snack before her proper meal. It helped green her back up a tiny bit overnight but she's still a bit sallow. I almost think I UNDERnuted them last time and I'll be less of a pansy the next time.

They also seem to be growing more at night now when they used to grow more during lights on. Is this an indication of anything one way or the other?

Here are photos. One from last night with them looking rather flaccid and sad, and another looking slightly better this morning.

[attachment=o203568] [attachment=o203569]

By the way, my pH was slightly high and I'm guessing that's what some of those spots on them are. (Or maybe splash, sometimes you can't avoid it when you water) I've lowered the pH for them by means of phosphoric acid. It was 7.3-ish and I'm watering them now at 6.7-6.8 and that is what their run-off water is reading as well.