Hikari 17.6-Ounce Spirulina Floating Pellets for Pets, Mini

A superior color enhancing, supplemental diet for hobbyists who want their koi looking their best. Natural color enhancing diet offering a superior blend of pure-cultured Spirulina and added carotenoids. If you're looking for the most vibrant colors your koi can muster without affecting the white areas of their body, this should be your first choice.