i wouldn't red devils range from pretty aggressive to really aggressive in my opinion there way to aggressive for polypterus go for more peacful cichlids oscars would be much better for example as long as the poly is big enough that is
think fish like geophagus , bay snooks , severums the peacful ones polypterus are bullyed eazily they can really defend them selfs a fish like a red devil would just destroy one if it wan'ted to and when they get older and decide its doesn't like the poly it most likely will do away with it
think fish like geophagus , bay snooks , severums the peacful ones polypterus are bullyed eazily they can really defend them selfs a fish like a red devil would just destroy one if it wan'ted to and when they get older and decide its doesn't like the poly it most likely will do away with it