TUBI CUBI freeze-dried Tubifex worms. Natural food in the form of cubes for omnivorous and carnivorous fish. It is obtained through freeze-drying of Tubifex worms (Tubifex tubifex). Tubifex worms are very eagerly eaten by the fish and aquatic turtles. They provide easily digestible protein. When served fresh, they may be the source of dangerous pathogens. Freeze-drying technique eliminates all the organisms, which cause numerous diseases. At the same time it helps retain delicate vitamins, unsaturated fatty acids, protein and other nutrients, making Tubifex an extremely valuable natural feeding solution. It can be applied dry or soaked beforehand.