Funny Chili Rasbora Behavior

Hiro

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HI all,
I’ve got my chilis for two weeks now and haven’t lost a single one. I noticed some funny behavior in my pack though. One is always frantically running against the glass, like, always. I shooed him off and he keeps coming back. One seems to have built a territory among the almond leaves I left at the bottom of the tank and furiously chase intruders. And two reddest chilis keep swimming against the filter current right where it’s strongest, and even charge at anyone coming too close. The larger chilis are comparably thinner than the smaller ones too, but they are eating fine. Any ideas? Are they probably just having fun or there might be a problem?
My tank is heavily planted, blackwater and cycled. My shrimps even bred before I added the fish
 

A201

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I wouldn't say the Rasporas were having fun, it sounds like they are establishing a heirarchy. It's normal behavior.
 

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