I used to have an oscar with my bichers and for the oscar i fed hikari chichlid gold and the bichers massivor pellets. The oscar fed on the right of the tank and the bichers massivore was on the left.
Never had any probs with any of them eating the others food...
feed with the light off or in the middle of the night that will give the bichir the advantage they use smell mostly to find food and sight to some extent mostly when going after live food
i have an oscar with my 2 sens. the oscar is about 4" and the sens are 2" and 4" each. so far no major problems, a few nips in the early days, but the oscar has now given up on the swimming hot dogs that inhabit my tank. he's more interested in what i drop in the tank.
i feed mine prawn and pellet. the pellet i mostly feed during the day, as my sens will come out for it, even with the lights on. i feed prawn at night, just dropping it around the tank. so my 6" bumblebee cat doesnt get the lot.
feeding pellet is easier than the prawn in my tank, as the oscar doesnt eat too much pellet or it comes out of his gills. he realises that. i call it well trained
the prawn is more solid though, so once its in it doesnt come out. so sometimes its hard to get the sens to eat. which is why i scatter it around.
but be carefull, one of my origional sens choaked to death on prawn, it had too much in its mouth and couldnt get rid of it. stupid damn fish...
No oscar but I have some convicts in my tank with the sen and gar. My sen has been really devouring krill these past days and sometimes a con will try to steal the krill from him...the sen kind of rears back and then kind of butts at the con with his head. So far no problems...I think cichlids for the most part will ignore bichirs (except for real killers like RD, midas, trimac, dovii etc) so it should be fine. Just keep that sen well fed so it the O doesn't get big enough to eat it, oscars tend to not bother with small fish if they're too big to swallow.
