Fluval Bug Bites Flakes are specifically formulated to address the natural, insect-based feeding habits of fish, with added vitamins, minerals and other trace nutrients important to their health and vitality. Suitable as a complement to all Bug Bites formulas or as a daily diet on its own, Colour Enhancing Flakes are rich in shrimp meal, which is a good source of astaxanthin - a natural pigment booster in tropical fish.