09-24-2012, 12:46 PM
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I would either return the glowlight, or acquire another 5 or 6 to make a shoal of 6-7. This fish is a characin, and characins are shoaling fish, meaning they live in large groups. They must be kept in a group, and 6 is considered the least number though more is always better. There are reasons for this.
Shoaling fish evolved that way for various reasons, and when they are denied a group it can be very stressful. This weakens the fish, but it can also increase aggressive behaviours. Even normally peaceful fish like glowlight tetra can get nasty when they are alone, or in a small group of 2, 3 or 4. And characins have teeth, lots of them, and aggressive behaviour due to stress is likely to show up as nipping other fish out of frustration. And the flowing fins of male guppies will be a real target.
We have fish profiles, second tab from the left in the blue bar across the top of the page, and each profile contains info on numbers, etc. You can click the shaded name in posts to see that profile.
Edit: I came across the same issue in another thread so I merged that thread into this one. It is best to keep a topic to one thread for consistency. B.
Last edited by Byron; 09-24-2012 at 12:49 PM..