sera FD Bloodworms are freeze-dried tasty morsels for all ornamental fish. They are ideally suitable as a supplement and for a varied nutrition according to the fish’s requirements. Due to the special manufacturing method and the vacuum freeze-drying process they are free from germs. In community aquariums they should be fed twice weekly. Exception: Tropheus cichlids must never be fed with bloodworms !Do you have questions about this article ?