1. Koi fry will have color when they are as big as Koi fry usually have color when they are half a month old. This kind of fish is a common large-scale ornamental fish, mainly produced in Japan, and there are many strains of it, such as Dazheng Tricolor, Showa Tricolor, Red and White, etc. Its color is rich, and in the process of growth, there will be a process of discoloration. Because it is close to carp, it is not difficult to raise, has strong adaptability to the environment, and is not afraid of low temperature.
2. How to raise koi fry1. Water quality: Koi does not like hard water, so it is necessary to soften the water before raising, otherwise the fry will be difficult to adapt. If tap water is used for farming, it is necessary to dry tap water in the sun in advance, so that the water can release chlorine gas, which is convenient for farming.
2. Water temperature: Koi seedlings of two to three centimeters do not require high water temperature, so it is enough to keep the water temperature at 25 degrees Celsius. If the water temperature exceeds 27 degrees Celsius, oxygen should be started to avoid hypoxia of koi seedlings.
3. Feeding: Koi seedlings of two to three centimeters are in a vigorous growth period, and the demand for nutrients is relatively high. Besides general fish feed, animal feed, such as earthworms and red worms, needs to be fed to promote the growth of Koi seedlings. Under normal circumstances, feeding animal feed twice a week can meet their needs.
