The 350 gram container of NorthFin Kelp Flake Formula is a highly nutritious daily fish food featuring delicious certified organic kelp that provides approximately 60 minerals, 21 amino acids, and 12 vitamins including nitrogen, potassium, and micro-nutrients and is also a source of beneficial vitamin K! Also included is High DHA Omega-3 Whole Herring Meal that contains DHA which promotes healthy development, growth, and coloration in fish, Whole Antarctic Krill Meal that contains high quality protein, amino acids, vitamins and minerals, as well as carotenoids and a high concentration of Astaxanthin and 100% all natural spirulina to promote optimal health and improve immune function. These delicious and palatable flakes offer a premier natural colour-enhancing supplement to ensure that your fish are able to display their beautiful bright colors at all times. Contains no unnecessary color additives or fillers. NorthFin Kelp Flake Formula is exceptionally versatile and well suited for a variety of omnivorous and carnivorous fish in both freshwater and saltwater environments.