King British Goldfish Flakes are a complete and balanced diet for all cold water fish. The flakes are specially formulated to meet the specific nutritional requirements of all cold water fish providing all the essential vitamins, minerals, trace elements, natural polysaccharides and essential fatty acids required by fish. The flakes also contain King British’s Immuno Health Booster which is a natural compound extracted from marine algae to help strengthen your pet fish immune system.