I know you said no CBB, but the Muelleri CBB is much hardier than the common CBB.
They readily eat any fresh seafood......calms,mussels,shrimp,scallops all available cheap at your grocery store and they'll also eat some frozen foods like Formula 1&2.
Mine hasn't touched a thing in 10 years........Sps,zoas, anemone, euphyllias, acans,lobos,chalices, ect.
They are also unique in that they aren't a commonly available BF.
Best of all..............aptasia eating machines.