table shrimp or fresh squid from the seafood counter, once to twice a week. i perforate the morsel well keeping it in one piece to facilitate digestion.
i corral the fish to the other end and partition with plastic eggcrate so it can completely consume the morsel without the fish using it for a soccer match lol.
my purple sebae is ~8"-9" and i've had it for a little over two years, was the size of a scallop.
i essentially target feed the fish, have mostly sps corals and don't feed my tank. the anemone with out a doubt would've died if i didn't keep the fish away and target feed it.