Try frozen mysis shrimp, it contains natural attractants, and has high HUFA's, make sure you get freshwater mysis shrimp, the saltwater kind is not near as good(hikari is saltwater crap) find someone down there from the list that has some of mine or find some PE mysis at a local store, Ive never had a butterfly that wouldnt eat mysis, and that includes all the "unkeepable" varities.