I got mine to eat frozen brine. Mandarin's move slowly and look at potential food for a while before eating it. I slow the water flow in my tank so the brine doesn't float as fast. I put some thawed food on the opposite side of the tank that the mandarin is in, for the active fish, then put the rest in near the mandarin. He normally can get 5 - 6 pieces before the "pigs" come over.