I haven't kept the African knife fish but the cutteri are definitely not African. I've seen them myself in Guatemala and Honduras. And I've had a very aggressive female who calmed a lot when kept with others of her kind.
Careful with the manzanita and make sure it's smooth... I've had some of my larger clumsier guys bang into it and cut themselves on sharp stubs of it.
Careful with the manzanita and make sure it's smooth... I've had some of my larger clumsier guys bang into it and cut themselves on sharp stubs of it.