So far nv heard abt cardinals eating other fishes cases before, normally cardinals are eaten by other fishes ....lol
cardinals are generally peaceful schooling fishes, even though the are 5-10 times bigger, dun think they'll attack the smaller fishes...
but if u wan play safe, then make sure ur cardinals are nv hungry......
or
keep ur boraras in ur quarantine tank till they grow bigger then introduce to the main tank....but that's gonna take long time
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