Rocco

take out fish, do a 100% water change, fill up with water, treat water with chlorinator and beneficial bacteria , this is your choice if you want you can add water clarifier. then your done.

put him in a quarter of water in a 5 gallon bucket and put 1/4 of a teaspoon of malefic in there leave him in for 1 hour and 30 mins and put him back in the aquarium repeat for 7 day or 10 days