Improved Nutrition Catfish Pellets are a highly digestible, low waste formula that contains all of the essential vitamins, minerals and trace elements that are required by catfish. Because catfish are bottom feeders the pellets are designed to sink to the bottom of the fish tank. Perfect for catfish of all kinds, the Improved Nutrition Catfish Pellets have been scientifically developed for the best possible diet. These heavy sinking pellets travel straight to the bottom of the tank so that the bottom-feeding fish can forage and feed easily. The food is in the form of 1 – 2 mm pellets. Made from highly digestible ingredients including vitamins, minerals and more, these pellets also contain a boost of seaweed extract that supports a healthy immune system.