I bought 6 green chromis all around 2" yesterday. They're in a qt tank with copper power at 2.30ppm. I noticed this guy a little nippy with the others. Is this euronema or missing scales from fighting? It does look a little red
. Thoughts? Should I remove this one guy and euthanize him. Going to get metronidazole today because I thought I still had, turns out I ran out.
All the other chromis look fine
All the other chromis look fine


