The most ideal environment for Nishikigoi is the water of the huge mudponds in the Japanese mountains. To achieve  the  same waterquality in a concrete pond as in the mudpond, Mr Yamamura believes there are 5 principles required  to achieve ideal water for koi. In these ideal conditions we can breed high quality koi that have beautiful bright skin and also grow well. Nishikigoi will always be more beautiful if the waterquality is the same in  nature.

The 5 principles : Ammonia and Nitrite levels should be close to zero, the levels of Nitrite always below 100mg/l, there should be clear water to allow penetration of sunshine and ultraviolet, there should be consistent pH levels and Sufficient mineral levels within the water.

When considering how to provide the optimum environment for koi, the Shinsuke Co., LTD. recommends “The Bio film theory”. What is Bio film? Bio film is formed by microbes and examples of this are dental plaque, the slime on a stone in the liver, the gel film in a week-old vase of flowers, etc. We can find many variations of Bio film in nature, where there is water and a source of bacteria. It is true to say that almost all bacteria on the planet (over 99%) lives on Bio film, rather than floating in the air, and sewage treatment plants depend on Bio film for bacteria to make water clean.

Shinsuke Co., LTD has developed products using Bio film theory to provide a high quality environment for making koi more beautiful, and these are: 1. Bacto Power 2. Bio sponge