What is this? Looks like lumps with something black under it. The fish is swimming and eats well.
Might be related but unsure. A month ago he was sluggish and losing fins. I noticed his scales were whiter where the lumps are. I treated with 2 tsp salt per gal. His fin loss stopped and he became lively and eats normal again. But the place where the white spots are, became lumps. And I see black under it. I believe the fin loss and lethargy were something else that the salt cured. I think these lumps are something unrelated but unsure.
How do I treat this? What are the lumps?