02-04-2012, 12:29 PM
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Even among "peaceful" characins, individual fish can sometimes get nasty within the group. Various factors are known to cause this, from genetic defects, environmental issues, water parameters. Sometimes enlarging the group helps, sometimes not. The member who suggested possibly removing the offending fish probably has the best solution, depending upon the extent of this bullying. If the other tetra are cowering in the plants, that is not good and a sure sign that they will be highly stressed and prone to health and disease issues, and likely premature death. If the chasing is just here and there, and all fish in the group remain active like all the others, that is not a problem but natural. If I could see your fish, as in a video, I might be able to narrow this down more.
[I like those stickers too.]
P.S. I moved this thread out of cyprinids and into characins, tetra are characins.
Last edited by Byron; 02-04-2012 at 12:33 PM..