For years the formulation team at Hikari has worked diligently to identify a probiotic that would be beneficial to marine herbivores. Once they isolated the preferred bacteria from literally thousands of options, they continued to work on a diet that would bring about the same results our koi consumers have enjoyed for more than a decade. After many years and countless feeding trials Saki-Hikari Marine Herbivore is the result. A diet all marine herbivores and omnivores crave!