So two days ago I purchased a blue tang that’s about 1.5 inches long. It was placed in a 55 gallon and now eats like a monster. Already trained to eat seaweed off of a clip and gets variety of meaty foods like omega brine shrimp, spiralina mysis, mysis and mega marine algae. One thing I did notice however is that he will scratch his gills sometimes against the rocks. He has no visual signs. The other fish in the tank are 2 ocellaris clownfish, Big eye squirrel fish, small yellow spotted scorpionfish and a baby panther grouper. Yes I have a plan for them when they grow out. I was wondering what to do if they have gill flukes and if there are any treatments other than praziquantel. Thanks!