Take a straw and cut a v in the end . Stick some krill, scallop, table shrimp, silverslide and stick it in the end of the cut straw. ( not all at once of course )I would just try one of those one time a day for 3-4 days. If that doesn't work get him a small feeder shrimp or small chromis or damsel. Mine has only eaten twice zonce krill and the second time a damsel. It's very tricky feeding these guys.