With Sera Koi Royal is the staple food consisting of carefully processed granules for all Koi. Due to its balanced carbohydrate vs. protein ratio and a percentage of 4% wheat germ it is very easily digestible and excellently suitable for a wholesome diet throughout the year. The requirements of the Koi are optimally fulfilled. Valuable ingredients such as omega fatty acids and immune stimulating mannan oligosaccharides support the healthy development and disease resistance. The floating granules keep their shape particularly well and do not pollute the water. sera Koi Royal Medium (4 mm/0.15 in.): Staple food for balanced growth of Koi between 12 and 25 cm (5 – 10 in.).4 % wheat germ