Matching of brocade varieties and density control of carp

Because of the difference between tank and pond koi, the matching and selection of koi has to be divided into two aspects. These two aspects are: tank koi matching and pond koi matching. Let's start with the difference - the difference in appreciation. What is the difference in appreciation?

　 Pool Koi is mainly appreciated on the back of the Koi, while tank Koi is mainly appreciated on the side of the Koi, so for their appreciation of the different focuses, generally in the pool Koi mainly to the Imperial Three (red and white, Taisho Sanshou, Showa Sanshou), Gold (or Platinum), Autumn Cui-Chui-Fu, five-color collocation, in order to show the charm of pool Koi.

Tank kept koi, on the other hand, should pay more attention to the appreciation focus on the side of the koi, choosing glossy koi, such as Pi Koi, Gosho, Akitsui, and Gold Koi. Combine them with the main gosans to bring out their beauty.　　But to sum up, in both pool and tank, the choice of match should be "mostly brightly colored koi, supplemented by darker, glossy and elegant ones".

Once you have decided on the main fish and the secondary fish, you also need to consider the size of the container and the number of tails it can hold. It is important to note that the number of tails to be kept according to the size of the container does not refer to the size you see at the moment, because koi will grow up and the density should be calculated based on the length of the adult body, and as the saying goes, "how many fish in how much water?" Beyond that, the quality of the water will be very difficult to control.

The aquarium is indoors and has a smaller body of water, so you can do a good job of keeping the effects of the changing seasons on the koi to a lesser extent. Moreover, compared to pond keeping, the water level of the tank is shorter, so you can see the koi more clearly. The discovery of the koi's body surface and condition can also be more timely, more intuitive and more convenient. In addition, the tank can also control the water temperature and avoid the contact of rainwater, which can avoid the occurrence of some fish diseases.

　　Appreciation of koi mainly depends on its gorgeous colors, robust body shape, elegant movements and the beauty of group swimming. If the density is too high, causing the koi to swim out of the way and the environment is confined, it will be difficult to reflect its beauty.