Roxanne - How quickly did Calypso's eyes progress from normal to bulging? Is this a gradual thing, or do you think it was connected to the medicine you used? If it is sudden, I would think that the gas bubble cause is the likely one, but aside from putting the fish in a decompression chamber, I don't know how to fix it. Could the medicine somehow caused an increase in nitrogen gas in the fish's tissues? Just thinking out loud, hoping it will stimulate some others to jump in with ideas.
Terry