Flakes eh; that's pretty cool. Mine is on NLS, frozen whole krill, and brine shrimp. It eats feeders too, but then again what kind of wolffish doesn't. However I don't really feed mine feeders to often because of the poor nutritional value compared to a pellet diet, not to mention diseases, parasites ect.. Just gets the odd guppy once or twice a month, keeps em alert.Your right only full. I had two of them before. Total pigs and love shrimp pellets as well and flakes.