Color food for goldfish and other coldwater fish. sera Goldy Color Spirulina is the color food consisting of carefully manufactured granules for bigger goldfish fastidious fancy variants and other finicky coldwater fish.The balanced and easily digestible composition with valuable ingredients such as Spirulina (10%) supports the natural color formation of the splendid animals in a directed way. The colors become stronger purer and are clearly separated from each other.The healthy development and disease resistance of the fish is supported. The floating granules keep their shape for a long time and do not pollute the water.