I don't think so, but they are predatory. Apparently they don't do much until food is in the water. Neat looking fish though.
I'd set the tank up as a planted tank and get some small predators. The butterfly fish would be fine. Microctenopoma ansorgii is a neat fish, not too common though. Related to leopard ctenopoma (Ctenopoma acutirostre) but won't get too big.
ABF + = african butterfly fish, but I assume you figured that out.
African brown knives get too big, don't they?
I'd set the tank up as a planted tank and get some small predators. The butterfly fish would be fine. Microctenopoma ansorgii is a neat fish, not too common though. Related to leopard ctenopoma (Ctenopoma acutirostre) but won't get too big.
ABF + = african butterfly fish, but I assume you figured that out.
African brown knives get too big, don't they?
