Ultra Clear Growth & Color Floating Koi & Pond Fish Food 2 liters Contains the exact amount of Spirulina that helps act as an immune stimulant, and also as a color enhancer Increases your fishs slime coat and strengthens your fishs cells to help them fight off stress related, and other diseases. Intensifies your fishs reds and blacks while maintaining brilliant whites. Feeding ULTRACLEAR Growth & Color food helps to promote good water quality Feed two or three times daily only when water is 10 C (50 F) or above.