Coldwater fish such as Goldfish and Koi do not require a diet that is high in protein. However, they will do better with a diet that is high in carbohydrates. Nutrafin basix Floating Goldfish Pellets provide a complete diet - fortified with multi-vitamins and stabilized vitamin C - for all coldwater fish. As a general rule, aquarium fish should be fed a varied diet containing freeze-dried foods such as Nutrafin basix Blood Worms. Bottom-feeding species should be fed Nutrafin basix Staple Food Tablets. Format: quart, 360 g (12.7 oz). Other formats available: A7183 Nutrafin basix Floating Goldfish Pellets, breeder, 85 g (3 oz).