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Rapid breathing

742 Views 3 Replies 2 Participants Last post by  smccleme
I have a geophagus that is breathing rapidly - has been for a few days. Now I see there is a bit of swelling behind his pectoral fin

Any ideas?
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Did you just get the fish? Or you've had it for a while in its current tank?
The tanks is stable - has been running about 6 months (No recent fish additions).

I am suspecting columnaris (Cottonmouth)

Currently doing 30% water change per week, about 20 x 3' fish in the 175G,
3 x xp3 filters + AC110
I would put it in a hospital tank and treat.
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