Dymax Goldfish ExcelGoldfish Excel is specifically formulated to promote prominent head growth as well as to help enhance its coloration even if fish is kept indoors. This product is developed for Oranda, Lionhead, Azumanishiki, Ranchu and many other fancy goldfish for their desirable body structure, excellent appearance and vibrant colours that will be noticeable within 30 40 days of feeding. Includes spirulina and astaxanthin for excellent colour enhancing purposes