2. Selection of koi fish: koi fish with bright colors, clear markings and neat edges is the best choice. Koi fish's red is pink, and koi fish is beautiful and thick. However, if the color-raising feed is used to promote the red color, it feels turbid and unnatural. In addition, it is easier to distinguish koi fish with a size of15cm or more, and the appearance of koi fish will change if it is too small.
Koi fish should choose fish with straight back, balanced body and stable swimming posture. The shape and mouth of the cheek are correct, the two ends are full and not sunken, and the fins are symmetrical, complete, flexible and firm.
3. Feeding in koi fish: Storing tap water in a bucket for 2 days to remove chlorine will also increase the oxygen content in the water. Koi fish's body temperature will change with the change of water temperature. If the water temperature changes suddenly, it will cause koi fish discomfort, and the optimal water temperature should be controlled at 23~28℃. Hard water is more conducive to the growth of koi fish. Well water belongs to hard water and tap water belongs to soft water. Suddenly changing from hard water to soft water will also cause koi fish discomfort, which is the reason for adding water.
Feeding it 2-3 times a day is best for koi fish. If it is the breeding season, the amount of bait in koi fish can be reduced by one-half or one-third, and that in koi fish, who is sickly, can be reduced by two-thirds.
Extended data
Koi fish has a strong physique, bright colors, changeable patterns and beautiful swimming posture, which is of great ornamental and breeding value. Its body length can reach1-1.5m. koi fish is distinguished by different colors, patterns and scales. Among them, koi fish, a butterfly, was successfully bred in 1980s and is famous for its long and smooth fins. It is actually a hybrid of koi fish and Asian carp, not a real koi fish.
The colors of koi fish include one or more colors, including: white, yellow, orange, red, black and blue (light gray shadow caused by black under fish scales), and the colors are dull or shiny.
Although the patterns vary endlessly, the best patterns are dots on the top of the head and stepped stones on the back. Fish scales may or may not exist; Big or small; Or have wrinkles, like "diamonds".