Have had him for 3 wks in Qt. Over the last week he has been shaking his head vigorously. Have treated with Prazi. Gave him fresh water bath but only for a couple of minutes as he was really stressing out. No flukes in the fresh water. If its not gill flukes what can be making him shake his heads and flap his gills? I did start general cure treatment this morning as a precaution. I have a cocktail of metro, nitrofuracin and kanoplex at the ready if someone thinks it might be bacterial.