Will the hammer die when the fish is rotten?

Yes Rotten fish tail is a serious fish disease, which can kill fish. Rotten fish tails are mostly caused by bacterial infection due to long-term water pollution or unreasonable water change, so the hammer will die after the fish tails rot. The rotten fin is damaged and discolored, and there are foreign bodies in the rotten place, or the transparent fin leaves are white and the white gradually expands.