Thank you so much for your help. I'll visit the pet shop tommorow and pick some protozin up and give it a go.

Thanks again : )

Initially I tried one for swim bladder. I have also tried one for finrot, fungus and also a wide range action treatment since the symptoms do not seem to fit any described disease.

Thanks for that tip : )

No, there is absolutely no bloating. They feed if they can get to the food, but largely they seem to be unable to move and show no desire too. I haven't seen this one feeding for the last couple of days though. He seems to be getting worse fairly rapidly.

There isn't a loss of colour, but they do seem to appear a slight shade darker than the healthy ones.

LFS....is that Local Fish Shop??? (sorry, I'm not at all familiar with the acronyms!) I am not sure, but I could look into it.

Hi,

About two months ago I bought 4 peppered Cory's. Gradually, one by one, they have died off, with a good couple of weeks gap between each death.

None have shown any external signs of illness. No gasping, no discoloration (although they did start to look a slight shade darker than the others ...