Generally, small koi can grow about 10-20 centimeters a year. Koi life span of about 70 years, the first year of the Koi can grow to 10-20 cm, the second year of the Koi can grow to 24-30 cm, the third year of Koi to grow to 37-40 cm, the fifth year of Koi to grow to 45-50 cm, 10 years of koi to 55-70 cm, more than 10 years of koi 100-150 cm.
The growth environment and water quality will affect the growth rate and body size of Koi. Therefore, if you want koi to grow fast and big, you should provide them with adequate living space, and control the water temperature at 20-25 degrees, change water on time, keep the water clean and oxygen sufficient. Food should be fed with nutritious, digestible and fresh feed.
The male brocade carp can be bred for more than two years, and the female brocade carp can be bred for more than three years. Male Koi of 3-6 years old and female Koi of 4-10 years old are the most suitable for breeding. Koi with reproductive ability can reproduce once a year. The best time for breeding is in April, May and June every year. Koi breeders should choose healthy and mature Koi, and according to the proportion of female Koi and male Koi in one to three. Culturists should pay attention to the isolation of female fish and eggs immediately after koi spawning, so as to avoid the eggs being eaten by big fish.
