Sera GVG-mix is an iodine-rich flake food with tasty morsels. Sera GVG-mix consists of 80% special flakes made from marine algae, ground krill and plankton--20% are FD bloodworms, daphnia and artemia shrimps. This iodine-rich food prevents diseases of the thyroid gland and thus should be fed at least once a week. Sera GVG-mix is especially suitable for community aquariums which are mainly stocked with live-bearing tooth carps, and for saltwater fish.