My koran tang has been in my QT for about 2 months with a full dose of cupramine, I knew it has something on the bottom fin. Today I decided to take him out to see and take pics. I now see some egg patches so I just did a methylene blue bath. Hopefully it will help. Anyone know what they are? It does not seem to harm him. Few weeks ago, I had also moved hum to another tank with Kanaplex to fix a fin that was not moving (or rotting). That was fixed but this egg patches didn't seem to go away (so kanaplex did not work for that).