thanks Mat, I'm pretty sure it's both those things. I'll try to do a thorough clean and maybe use some medication to be on the safe side.

well the gravel is fairly fine and smooth but I'm sure it makes a pretty good trap for waste. I've tried cleaning it more often but obviously that puts the pandas at more risk of getting sick. Incidentally I had the same problem with norman's lampeyes so I put them in a different tank without gravel ...

thanks for the reply. I too think it's probably some kind of organism living in the gravel as it's only when it's stirred up that they get sick. I will look into that medication and think about changing over to sand. I thought sand would be very difficult to clean but if all the dirt stays on the ...

Hi folks

I registered here in the hope of finding a solution to my problem with Panda Corys. I've had some since I got my aquarium about 18 months ago and they seem very happy with the conditions. They feed well and are not bullied, have lots of places to hide etc and the water parameters are good ...