1, it's good to keep one, but if koi fish wants to pay attention to it, it's usually odd. It is also said that it is more appropriate to raise 3, 6 or 9 fish. If the tank is big enough, 9 yuan is best. However, the water-raising technology is excellent, otherwise there will be many diseases and troubles.
2. For a long time, koi fish has been called "Feng Shui Fish" and "Lucky Wang Fu Fish". Not only can they be kept at home, but many people keep koi fish in fish tanks in the company.