Loner fish

[jesssa]

I have five silvertip tetras in my tank and four of them hang out together and one likes to hang out by itself. Is that a normal thing? sometimes the other four pick on the loner a little, but it doesn't usually seem to mind. I feel a little bit bad for it, do you think there is anything I can do? I just wonder if it is lonely. I mean it's kind of a weird situation, I probably should have bought 6 of them in the first place.

 

[The-Wolf]

there could be a medical reason for this
Signs
Individual fish stay apart from others. Breathing is normal. They may refuse food. They may have "cloudy" or grey areas on the skin. There are no other physical signs.

cause(s)
1) Fish may be suffering from a parasite problem
2) There could be internal disease problems
3) Early stage of systemic bacterial infection

I'd keep a close watch on this fish to see if anything else develops.