1 When raising koi fish Jr, you should prepare a large enough fish tank, which will give koi fish more room to grow. At the same time, we should pay attention to changing the water in koi fish regularly to keep the water clean and make koi fish grow healthily.

Koi fish is a highly adaptable fish, which is relatively simple to raise, and light is more important to koi fish. The owner should pay attention to let koi fish receive light for a period of time every day, so as to grow faster.