Kingyo Zen is a premium Goldfish Food developed using the most recent feed learning research data and overseen by a Goldfish industrial engineer. * This product contains b-glucan and torula yeast, which helps Goldfish maintain a healthy immune system. The good bacteria TOYOSERIN contained in this product aids digestion, and after evacuation with faces, the sewage piled on the filter is resolved, and the water quality is stabilized. This is a Goldfish weight gain food with a high protein and fat content.