Iodine-rich flake food with tasty morsels. sera GVG-Mix Marin 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 Marin is especially suitable for marine aquariums.