I just wanted to know if fins can grow back. For some reason all of my fish have come down with fin and tail rot. Nothing in the tank has changed, water quality is excellent and I quarantine all fish. My Achilles Tang has lost almost half of his pectoral fins as well as my skunk clown. And during all of this I lost a black tang, do not know why. I have started treatment with Melafix and the rot has seemed to stopped. Can anyone help me with this, or provide some advice or past experience?