Goldfish are one of the most popular aquarium pets in the world. But many owners get confused about what goldfish eat, how much to feed them, and what makes a healthy goldfish diet. Feeding them the right way keeps them healthy, active, and living longer. Best Goldfish Food & Diet Food Type Details / Benefits Flake Food Easy to feed, but can cause water pollution if overused Pellet Food Sinks or floats, provides balanced nutrition, less waste Gel Food Soft and digestible, reduces swim bladder issues Vegetables Peas, spinach, zucchini, cucumber – help digestion Live Food Brine shrimp, daphnia, bloodworms…