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Author Topic: Aggressive Rasboras? What the heck?  (Read 5968 times)
20 Gallon: Apisto Agassizi, Bolivian Ram, Neon Tetras, Peppered Corys
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« on: February 12, 2008, 07:18:21 PM »

So I got rasboras thinking they would be a peaceful community fish.  Well Ive had them for about a month and now one of them patrols the open space of the tank and the other 4 hide in the plants fearing attack.  This behaviour just started recently.  How can I fix it? 

Tank is a 20 gallon tall
1 Dwarf Gourami
5 harlequin rasboras
2 corys

Thank you and  11579
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« Reply #1 on: February 12, 2008, 08:21:56 PM »

I think it is just an aggresive male, Are his colors particularly flashy?
I have a flame tetra that is like that, and he seems to be the "alpha male" of the flame tetras and his coloring is also magnificent.
maybe the aggressor wants more room. parhaps putting in more rasboras would help or a bigger tank would work.
Whoa. Where did I put all my stuff?
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I know where rasaqua's stuff is.....

« Reply #2 on: February 12, 2008, 08:35:53 PM »

Yep, more Rasboras (same species). I would add at least 5-6 more. Tank size is fine for your fish.  11579

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"For every difficult question, there is an answer that is clear and simple and wrong."
(George Bernard Shaw)
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« Reply #3 on: February 12, 2008, 10:39:32 PM »

i have 10 Ras. Het. (harlequin) in my 29 gal and i have never yet seen a display of agression (other than trying to eat fry)

40 Gallon:
Hi-Tech Planted Tank

1.1 Cornsnakes | 0.1 Ball Python | 1.0 Red-Tail Boa

2 Cats

2 Dog
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« Reply #4 on: February 12, 2008, 11:29:57 PM »

I'm actually in a similar situation but with Zebras!
I've noticed that the biggest Zebra in my little school chases every other Zebra around and he basically patrols the middle part.

Today I redesigned the look of my tank and I guess they got freaked out and began schooling very tightly. Now they are all swimming together like they used to.
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