i currently have a footlong micro sharing a 500 gal tank with 5 red pacus and 2 albino common plecos. i tried adding 5 oscars and 3 common bichirs. in but the snakehead killed 2 oscars and injured 3 of them. i removed the bichirs in fear of being eaten. im thinking gulper catfish, peacock bass, endli cheri, asian aro, red tail catfish of about the same size? these fish are quite expensive so i post here before making any decisions..