Mines did well with hap mooriis, frontosa, clowns, red tail+rainbow sharks and few others. Did eat a few of my tiger barbs but that was it. Fahaka was 10" and had it from a baby around 1 1/2".
mine is with silver dollars i got 5 of them in my tank plus my eight inch fahaka..
they seems to be ok together..emm but i tried to put other tank mates my fahaka ends up having them for breakfadt luch dinner hahahaa