Can’t figure out what’s going on? Not growing vertically and this in the photo. ph run off is low about 5 ish when I flush with just ph water at 6.3. Is this the correct way to do it and test ph soil? Also on the neighboring plant the leave split and pieces decaying …

Looks like dirt on the leaf. Can you rub it off?
I just changed the position of the fan 2 days ago to have space for bigger pots. The fan is pointed down but not super high. And the plant has been growing like this even before the fan movement.
Is the fan on too high blowing directly on them?