I've got 2 BTA and one of the BTAs moves a lot. The other pretty much stays put. I wonder if it gets sensitive to the light, because he moves to the bottom of the tank, then after a few days he's back to the top of the LR
again. I only have one clown (Tomato) and he two times. Recently I fed both at the same time. I gave them each a small piece of shrimp soaked in ZOE vitamin sup. The clown went to the Torch Coral for the night. Next morning he's back at it.
I think they do just fine moving around. I don't see any real logic to the movement. I have several LPS
, buttons, and leathers... None have been effected by the BTA's movements.