NorthFin Arowana Premium Fish Food. NorthFin’s Arowana Formula is specifically made to intensify your Arowana’s colours. Large portions of whole Antarctic krill are used to produce these floating Arowana sticks, making it irresistible to your Arowana fish. Available pellet size : 3 mm Type : Floating sticks Recommended for : All type of arowana and carnivore fish Available Sizes: 250 g / 500 g / 1 kg