I feed a varied diet to all my fishes but my festae love hikari bio gold plus, market shrimp, freeze dried krill, talapia, and I sometimes give them black worms... those can get messy though. mine get nice and beefy. I also picked up a female that looked really malnourished with a sunken belly and supper faded color. After getting her on that diet she has since colored up and started beefing up