Trumpet knifefish??

Bret11

Jack Dempsey
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How big do trumpet knifefish get and are they aggressive?
 
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kno4te

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Seen an 18in a while ago. Peaceful and similar to bgk. No aggressive tankmates. Better in groups but need a large tank.
 
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Bret11

Jack Dempsey
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Oct 10, 2018
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Seen an 18in a while ago. Peaceful and similar to bgk. No aggressive tankmates. Better in groups but need a large tank.
What’s the minimum tank size for them?
 

Audaxcity

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IME, knives don't use as much space as most fish their size, but I'd say an absolute minimum of 125g long term just because apparently trumpets get pretty big.
 

kno4te

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I’d say a 180 lifelong. As it should be able to hit the 20in mark.
 
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blackbullhead

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Depends on what you mean by trumpet knifefish...some species of Rhamphichthys grow to 3 ft. They can be aggressive toward each other, but they really can't do much damage as they don't have any teeth.
 
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