Cooperband fish Disease ID

[Tarlon]

Please could you please help me to identify the name of this disease on my fish?

 

[EmdeReef]

Are the marks black? Any other place?

 

[Tarlon]

Yes in its dorsal fin and yes they're black

 

[EmdeReef]

Yes in its dorsal fin and yes they're black

Only 1 spot?

It could be bacterial if only one spot or an injury, unless there’s a chance it got stained somehow?

 

[Tarlon]

Only 1 spot?

It could be bacterial if only one spot or an injury, unless there’s a chance it got stained somehow?

Yes only one spot
I do not believe it, it grows more and more every day

 

[EmdeReef]

Yes only one spot
I do not believe it, it grows more and more every day

Then I would consider it bacterial. You could either wait and see if it keeps getting worse or treat with antibiotics in a quarantine tank.

Metro, kanaplex and furan 2 for 10-14 days should help clear it up.

 

[Big G]

Agreed ^^^ if you can source NFG powder it works wonders on butterflies, angels and tangs.