Our Fry Food is fed to over 500,000 Koi Fry every year at Cuttlebrook Koi Farm, the UK's leading breeder of Koi Carp. Most used feeds on the market contain around 33-40% protein, however, this is inadequate for the needs of developing fry, regularly leading to bent spines, tails, curled-out gill covers, and incorrectly developed fins.