Mazuri® Koi Platinum OgataMazuri Koi Platinum Ogata are a highly palatable floating koi fish food designed to help keep your koi healthy and beautiful. Suitable for koi 12 inches or larger, these koi fish food pellets not only provide optimum nutrition for your fish but also contain spirulina algae and other nutrients for vibrant coloration. Plus, floating Mazuri koi food encourages fish to come to the surface of your pond, tank or aquarium so they can be observed feeding.