i had a sailfin pleco with my bichir all good , but they crap loads i would try some good size group BN , or SAE , but there is always someone trying to give away large CAE and look good when big imo..
you must be spoiling flagtail too much ...
Could you keep a Breeding pair of CA Cichlids(larger species ) ,With a large Aro or is it asking for trouble ?
Busting to try somthing different and i havent bred fish for yonks ....... 8)