So far I've been feeding my cuda fish such as white clouds, guppies, and a few mollies here and there. He had 4 fully grown white clouds, and 4 mature neon tetras in his tank 2 weeks ago, but even with 8-10 fry/baby white clouds a day, I came down stairs to find that he ate his 8 other friends I was thinking of maybe getting him on mostly mature guppies within the next month or so since I've been "power feeding" him the past 5-6 weeks, but I was just going to see what everyone else feeds their predators.