Suggestions for an interesting cull eater?

I'm not even sure where to find the African Butterfly. . any ideas?

Can the Ctenopoma have bottom dwellers with it too?

if they are big enough,. plecos and they say cories,. but i would stay away from kulies,
 
Ctenopomas will eat anything that's small enough, and they hunt the entire depth of the tank. African butterflies are seldom away from the surface by more than 2-3 inches, so fish that stay at or near the bottom will be safer.
 
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