Simple and natural freeze dried loose tubifex worms. Tubi-Fine is graded to 0.4mm, small loose worms that are easy to feed and float on the surface of the aquarium water. Single ingredient fish food freshly packaged with oxygen absorbers offer an irresistible, fresh flavor that naturally attracts fish. Tubi-Fine provides a high protein feeding addition for freshwater and marine fish including Betta fish, Tetras, Guppies, Rasboras, Danios, Gouramis, Barbs, Angelfish, Livebearers, Small Cichlids and many fish that eat floating foods.