52g Tetrafin Goldfish Flakes Tetrafin Goldfish Flake Nutritionally balanced premium flake food for all goldfish. Optimally balanced flake mixture for a varied diet. Contains all important nutrients as well as trace elements. Promotes health, natural colouring and vitality. With the patented BioActive formula - for the long and healthy life of your fish. With Clean & Clear Water formula: Improves food conversion and reduces fish excretion - for clean, clear aquarium water.