Kusuri are the only UK Koi food suppliers to have their food made to a researched formulation. Research carried out in the late 1990’s in conjunction with Exeter University Biology department proved that by adding 8% clay we would achieve the optimum level for growth, assimilation and minimal waste. Our unique foods contains calcium montmorillonite clay which increases assimilation by up-to 22%. As well as producing fabulous growth to your fish because their is less waste which has a knock on effect of maintaining superb water quality.