I agree with DeLgAdO. It looks more like a bloat or 'dropsy' infection.
It's an internal bacterial infection that can be treated with mardel's "Maracyn 2"
Do you have any pics of it alive? I've never seen a long fin that big swiming around in a tank.
It's an internal bacterial infection that can be treated with mardel's "Maracyn 2"
Do you have any pics of it alive? I've never seen a long fin that big swiming around in a tank.