NorthFin Goldfish Formula Premium Fish Food. NorthFin’s Goldfish Formula offers your goldfish the nutrition they need to have a stable and healthy life. Since Goldfish are primarily herbivore fish, NorthFin ensures it uses Organic Kelp as its predominant ingredient in its formula. NorthFin’s Goldfish pellets are slow sinking which prevent your Goldfish from taking in air while eating. It also contains natural Spirulina, which is packed with raw proteins, minerals and vitamins. Available Pellet Size : 2 and 3 mm Pellet type : Slow sinking pellets Recommended for : All types of Goldfish. Available Sizes: 2 mm (100 g, 250 g) 3 mm (100 g, 250 g)