Just noticed my dwarf gourami has had one of his side fins completely torn off. My guess the culprit is my male pearl gourami. But never seen aggression between the males. Anyways the dg is swimming around and eating. Not acting injured. How can I help him. Can this fin grow back? Obviously clean water conditions is critical but what else to prevent an infection. Luckily my 10g got a fully cycled reading today so instead of getting a betta I guess the dg is moving. What else can I do. Will aquarium salt help at all?