This best selling goldfish food has been optimized with the fish keeper's success in mind. Tetras "Clean & Clear Water Formula" means that the flakes are even easier to digest and do not leach colour, thereby keeping aquarium water clean and clear. TetraFin continues to be made with patented, health-enhancing ProCare. This precise blend of immunostimulants, vitamins, biotin, and Omega-3 fatty acids is custom designed to strengthen fishs resistance to disease and stress.