I just bought a new maroon clownfish this afternoon. It is about 3 inches long and looks very healthy. I made sure it was eating before I left the LFS. Now it is home and in it's quarantine tank and is acting like it has ingested a balloon. It tends to float or drift towards the top. When it does this, it makes an effort to swim downward again but something beyond it's control makes it float up again. Right now it is hovering near the top with part of it's dorsal fins and tail actually out of the water. I would appreciate any help that someone could give me with this problem.