two tetras together

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    Head-and-Tail-Tetra Behavior: Circling

    Hello all, I have a few questions about head-and-tail-light tetra behavior. I used to have 3 of these tetras in my planted 10 gallon glass aquarium with intentions to get more once I transfer them into my 30 gallon that I have not yet started to cycle... there are only 2 left- the two bigger...
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