I know this is something that is talked about but couldn’t find my specific issue. New goby is breathing hard from store and is quarantined with 3 other fish. I have started copper but have not gotten all the way up to 2.5 yet. All other fish seem normal and are eating fine. He is breathing hard, haven’t seen him eat, doesn’t appear to be coughing, and is moving around for as much as a watchman goby moves. Was thinking about FW dip but not coughing so not sure if flukes are the problem. Any suggestions would be helpful.