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Permalink Reply by Hmoobthor on November 6, 2011 at 10:26pm

rainbows are better in groups.

 

Having two speices of one group each is much better than mixing alot of rainbows into the tank.

 

 

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Permalink Reply by Jamepsss on November 7, 2011 at 6:11am

I keep a mixed species group of all males. If the tank is big enough then it's better to have a 2:1 ratio of female to male. Big groups of the same species would look great in a big enough tank but Rainbows don't really 'school' IME so a mixed species group works well if space is limited and you want a few different 'bows.

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