The sure-fire way to get my bamboo shrimp out fanning is to take some Ken's veggie sticks with calcium AND a little bit of flake, then grind up up as much as possible in my fingers. I grind it up as much as I possibly can, then toss it in. Within 20 minutes, he's out fanning.
But you know, 2 weeks isn't that long. Maybe he's just settling in? Mine got hungry and pale for a few weeks, then made a great comeback.
"The fewer our wants, the nearer we resemble the gods." — Socrates