The second picture looks like the fish has an pinkish ulcer on the
middle of its body. The third picture shows blackening of the fish.
The fish also looks slightly swollen.
Several things could probably cause this, but my vote (based on the
commonness of this disease in Rainbowfish) is that it is
Mycobacteriosis.
I hope I'm wrong. In any case, the other fish probably now have what
this one has. So there's no need to panic.
You may get lucky and this fish will be the only one affected. Still
if it doesn't improve and starts to deteriorate, I would think about
removing it from the tank at some point.
The Rollins Animal Diagnostic Lab in Raleigh NC will do a complete
evaluation for $30. Phone # 919-733-3986.
The
> Power Sponge Filter
> Lot of Plantation
> No CO2
> Once a month 20-40% water change
> Tank is aerated 24/7, it has gravel bottom.
> Have 16 fish in this tank and none is showing any of these signs.
> -------------------------
> Please provide your kind feedback and recommendation, hopefully I am
> not too late.
>
>
> Thanks,
> Selman
> =======