Tropical Fish Keeping - Aquarium fish care and resources

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bigk_54 06-20-2008 11:32 AM

Blood Fin Tetra Issue (aggressive toward other fish)
Hello all please excuse me I kinda new at thsi....... I have a 55 gal tank, in it I had 3 Zebra Danios, 4 Glow Lite Tetra, 4 Cardinal Tetra. Yesterday I added 4 Blood Fin's, once they got into tank 1/2 hr 45 min later they started bossing the Cardinals around and all of a sudden today one of them is MIA. They seem to leave the Danios alone for the most part but they are trying to be king of the roost. Stuff I read on them says they are not really aggressive and get along. Do I need to fear for my other fish or in a few days will they all work out their domain and that be the end of it?! I had a couple bala's for awhile and when they went in they didn't bother the smaller fish.

willow 06-20-2008 04:05 PM

the only thing i can think of is make the group larger,as they are a shoaling fish,from what i can see.
however don't just go on what i said,see what others can come up with.
maybe someone here keeps them and can give you some
home grown information.

bigk_54 06-20-2008 06:04 PM

Yeah guy at LFS told me to get at least 3 so I got 4, I read you should have 6?! Seems that the one Cardinal was dead I found him on the filter intake. :( He was missing his tail so I don't know if they just chewed him to death of if it just deteriared (?).

willow 06-21-2008 09:45 AM

aww poor thing.
hope you don't have any more losses.

tophat665 06-29-2008 03:42 PM

First up, you need at least 6 tetras in a school. 10 if they're nippy.

Bloodfins tend to be fast moving and can be nippy. This seems to be common in the genus Aphyocharax. I don't know as I would mix them with the smaller more passive tetras like neons, cardinals, and glowlights, or with ones that can stress easily, like rummies. Course, this is booklarnin, not experience, so take it with a grain of salt.

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