Hi, I am in need of some good advice here. I manage an animal collection at a college and this week we were asked to take on a tank and 5 piranha. It was an emergency situation as these fish had been abandoned so the whole thing had to be done in 2 days. All the usual rules of fish movement and tank setting up were out of the window. The filter had been left discontected over night and there was no spare tank to house them. These are large fish - around 10-12inches and 4years old. The water was beyond disgusting. The fish themselves have red tumour like growths, general lumps and bumps, some seem to have some bruising and some have cloudy eyes and growths on their eyes. I'm amazed they all survived the move. We were able to house them overnight in a warm terrapin pool while we transported the tank and filled it. We used mature water from the terrapin pool along with around 70% dechlorinated tap water. I'm torn between euthanising them or attempting to treat them. If I post some pictures would anybody be able to give me some advice please. It's a 650l tank with a fluval fx6 filter.



