it might have. the fish seem to be getting along but one of my fish did jump out of the tank when I was drip acclimating and I immediately put him back in. I am not sure if that is the same fish (i have a school of 5)
its a physical injury and while should heal on its own, chromis like to chase and fight and may subject fish to further injury. Isolation is warranted and treatment with either Seachem Kanaplex or maracyn 2 in a quarantine tank with added oxygenI have a new green chromis that has been in my QT tank for 24 hours now. I did not notice this until now but one of the fish has a small white patch on his head. I am not sure what it is and have not noticed any other symptoms. Is he sick? Should I treat with something? I have some copper power medication just in case.
The injured fish is already in my QT tank with 4 other chromis. Since I only have 1 QT tank, can I put the medication you listed in the tank with the whole school? I do have a breeder box that goes inside the tank. I could use that to separate the injured fish.
Separate injured fish and while you can add treatment, I dont favor treating fish with symptoms, however you can treat them all with ruby rally Pro which is reef safe and safe for all- just will work a little slower than Maracyn and Kanaplex
I am not treating with anything. They are in QT since I bought them 24 hours ago
Hahaha yea damesel fish are weird fish, they love the agression... however their bodies usually dont lolHe looks a little sad separated from the rest of them but he's safe now
Oh man sorry about thatOh no! When I woke up this morning, the fish was laying down in the net. I was able to get him a little bit of food but seems like he is going to die soon. Is there anything I could do for this guy? Should I get another fish so my school has an odd number?
is he breathing fast? Are the others doing okay??? 
He is going back and forth between breathing really fast and normal. The others seem to be okay and look normal.Oh man sorry about that
I would maybe hold off on purchasing another one until everything is sorted, 4 isnt a bad number but more never hurts to spread out the bullying... although all my chromis slowly just kinda bullied eachother to death until there was 3
He did not have any of those symptoms. He was moving a little erratic before he died but it didn’t look like spasms.
Although it isnt a typical location for this, green chromis are really prone to developing Uronema. Seeing the fish laying on its side indicates that this is more than just a minor injury. If the lesion turns red it is most likely Uronema. Here is an article about that:
www.reef2reef.com
It did not turn red before he died (this morning). The only other symptom I saw was him struggling to breathe close to when he died. I do not see anything wrong with the other 4 chromis. Should I add copper to the QT as a precaution?Although it isnt a typical location for this, green chromis are really prone to developing Uronema. Seeing the fish laying on its side indicates that this is more than just a minor injury. If the lesion turns red it is most likely Uronema. Here is an article about that:
Uronema / Red Band Disease - Hemdal
Red Band Syndrome in Marine Fishes: Caused by the Protozoan; Uronema sp. Jay Hemdal Introduction: This moderately common disease of certain species of marine fish is so often misdiagnosed that most aquarists apply incorrect treatment methods...
Jay
