Why do my red eye tetra chase each other around?

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I agree with all of the posts. I have kept Tetras for years and that is pretty much how they act. They are establishing a pecking order in a somewhat playful manner. Wolves, for example, do the same thing. Just don't cross the BIG guy!
 
In that small of a space they're just jockeying for territory, once you let em loose in the big tank they'll be fine..
 
Ya in a few weeks, i got them a few days ago. theyrs 6 in a 10 gallón QT, i want to buy 5 rummy nose tetras today before they go out of stock. Can i put them with the red eye?
 
Thats a lot of fish for a 10g QT. You can do it if you do daily water changes, but otherwise your parameters will get out of whack pretty fast.
 
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