For cuts and bad scratches I like methylene blue in a bath and then treat cuts that are gaping or sores with NFG powder (nitrofuracine) in the qt tank. Works great. Keep an eye out for redness or white film building in the area and then treat with antibiotics. Here's Humblefish's advisory for mb:
Malachite Green/Methylene Blue: Treats ammonia burn, cuts, injuries.
How To Treat - Comes in both liquid and powder form, sometimes mixed in with another medication(s). So, follow the directions on the label. Best used as a 30 minute bath solution, but you also can treat with it in a quarantine tank. Aerate heavily. If you are using it in a bath solution, then it is also a good idea to treat the fish with nitrofurazone (active ingredient found in Furan-2 and Nitrofuracin Green Powder) once he is returned to the quarantine tank. Nitrofurazone is great for treating open wounds or sores.
Pros - Highly effective.
Cons/Side Effects - Depletes oxygen from the water. Malachite Green is considered “harsher” on fish than Methylene Blue.
Malachite Green/Methylene Blue: Treats ammonia burn, cuts, injuries.
How To Treat - Comes in both liquid and powder form, sometimes mixed in with another medication(s). So, follow the directions on the label. Best used as a 30 minute bath solution, but you also can treat with it in a quarantine tank. Aerate heavily. If you are using it in a bath solution, then it is also a good idea to treat the fish with nitrofurazone (active ingredient found in Furan-2 and Nitrofuracin Green Powder) once he is returned to the quarantine tank. Nitrofurazone is great for treating open wounds or sores.
Pros - Highly effective.
Cons/Side Effects - Depletes oxygen from the water. Malachite Green is considered “harsher” on fish than Methylene Blue.