Australian Blackworm Sinking Pellets are specially balanced aquatic food with high protein for tropical fish. These slow sinking pellets are processed from blackworms (lumbriculus variegatus) and fortified with the finest ingredients and vital vitamins. The pellets have a crude protein content of 39.8%.Sinking Pellets are manufactured from naturally occuring aquatic blackworms that are commercially cultivated. It is a high protein food suitable for both freshwater and marine fishes. These pellets are produced from Australian Blackworms raised and harvested in a protected environment ,in large indoor troughs. As the food sinks aquatic fish at all levels can feed on them. It is often taken by the most finicky fish. Black worms Pellets are an amazing food for killi fish, discus, livebearers (including guppies, platys and mollies), rainbow fish, tetras, cichlids, bottom dwellers and most other community fish. They are clean and convenient to use.