If it's dropsy, what actually causes it and is
it terminal? What about remedies?
It looks like Dropsy.
What? -body accumulates water, ie, kidney failure, what? Kidney
failure, unknown, etc.
bacteria infection is often blamed for it but there are other things
which could possibly cause it
The very best method to avoid the problem is to keep the water fresh and clean.
When was the last time you changed their water? How much of it do you
routinely change? If the distress has not gone too far, you might
bring the patient around by putting him in fresh water, but the cure
rate is not favorable. As far as the remainder of the fish in the
tank, they are the ones which need fresh water ASAP.
Cures, I have not known of anyone curing the disease once it reaches
advance stages.