I got my buddy into this hobby. He has a 6 week old Bio Cube 14. Live sand and rock. Parameters are fine and PH is 8.1. He introduced a wrasse to the tank and it is terrible. It has never eaten (10 days) it is upside down and not buoyant. It sometimes wedges itself in a rock; usually upside down...or it is just caught in the current and swirling in the tank. It is still alive!!! (I don't know how) I read things on line about what it could be. (virus/bacteria/parasite..etc) But I can't figure it out or how it is still alive. Does it have a chance and if so what can we do about it? Thanks for any comments or advice...