Thanks for the suggestion. Its a real puzzle for me, I seem to get one of these canoers on every grow. And when I look up the symptoms it seems that the diagnosis could be almost anything.
You're right to notice the fan in the corner. And this plant is closest. But here's the thing .... the canoeing started long before I turned the fan on. I'm pretty sure that it isn't heat stress or wind stress. I'm suspecting something in the soil or reservoir. Interesting that its a 4-Assed Monkey ...
@Boradan Maybe my 4AM is also finicky about sharing the reservoir with 3 other strains. The reservoir has been delivering Reverse Osmosis mixed with CalMg and MegaCrop - both at 1 mg/L. Sometimes these problems seem to self-correct or just fade away as the plants get more mature.
At this point, she is starting to show pre-flower development.