Cobalt Goldfish Flake Food features a nutritionally balanced formula for beautiful color, consistent growth, and palatability. It features the enhanced blue flake, which provides a combination of triple-vitamin boost and natural immunostimulants that strengthens a fish's biological resistance to disease. In addition, Cobalt flakes are packed with powerful probiotics in the form of naturally occurring bacteria. Strains of Bacillus sp., are proven to improve digestion and intestinal well being. This unique formula will not cloud water. It also produces less waste for a cleaner aquarium. It is the ultimate nutritional diet for health, color and digestion.