Sound like either the following:
Bad handling
Water is not cycled
Water parameter

and or

Overfeeding

CapFusion,...


"Babel Fish" wrote in message
...

"Dick" wrote in message
...
On Mon, 9 Feb 2004 17:03:57 -0000, "Babel Fish"
wrote:

In my experience fin rot follows fin nipping. Have you got an
aggressive fin nipper perhaps?

Melafix often clears "rot" and is safe for most fish.

None of the fish seemed aggressive. All were dead within a week of
introducing them to the tank.