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hello there, i have 10 cardinal tetras in my planted tank and wondered if i could put some othere tetras in there. i have had them 4 a year now and was thinking of either getting half a dozen red nosed tetras or some x ray tetras will this be ok?
thanks
 

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How can we know if you don't tell us what size tank you have.
 

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Keeping more than onen species of tetra shouldn't be a problem in general terms. In the wild dozens of different species share the same habitat. A few species are known to be a little nippy but rummynose and x-ray tetras are pretty tranquil. Of course how many you can keep is dependant on the size of the tank, filtration, other tank mates, mantinance schedule and other factors.
 

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as previously stated, it all depends on the tank and filtration

most tetras will mix happily enough. fin nippers shouldn't be an issue with cardinals, but you may wish to choose a more peaceful sp anyway.

also worth noting, a big school looks more impressive than 2 smaller schools of different sp (but when you get really big numbers, then 2-3 sp of 30-40+ each that works quite well)
 
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