Cobalt Shrimp Pellets are an economical supplemental sinking food, a perfect complement to a complete diet of other Cobalt fish foods. Ideal for shrimp, crayfish, freshwater crabs, medium and large grazing tropical fish, larger cichlids, oscars, pacus, and bottom feeders such as loaches and catfish. Will not cloud water. The scientific advancements of probiotics coupled with a solid nutritional base help support a healthy digestive system. Cobalt's advanced nutrition means less waste for a cleaner aquarium!