One of my six serpae tetra always strays from the group should i be concerned?

Question

One of my six serpae tetra always strays from the group should i be concerned?

Answer 1

No,not unless it`s being picked on,or not eating.

Answer 2

Antisocial loner tetra...sounds like the makings of a serial fish killer.  I would put him in a separate tank.

No but seriously unless he looks ill or like he is getting beat up on  I wouldn't be too concerned.  I have found when I have fish staying separate from the crowd they are either pregnant or sick; in either case I might want to quarantine it.

Good luck