Find the fish that did it a put them in the corner. Best thing you can do is keep the water clean as possible so you should do more water changes, API stress coat or something like that and dose as instructed. I know other people are going.to ask so whats your toxins levels, tank size and what other fish are in the tank
My large red tail shark has a bit if her fin missing and it is red can any one help with what to do plz
Forgot to say marine salt is not the same, your lfs should have aquarium salt