How to raise Carassius auratus

Brocade crucian carp is a common ornamental fish in our country. It is deeply loved by fish friends because of its bright body color and easy breeding. Some fish are specially raised at home. How to raise golden crucian carp?

1. Temperature management: for the newly hatched fry, the optimum water temperature is 22 ℃ ~ 24 ℃, and the fastest discoloration is 25 ℃ ~ 30 ℃. Note that the change of water temperature should not exceed 3 ℃, otherwise the fish will catch a cold and get sick. The water depth should not exceed 50 cm, otherwise the pool water will have thermal stratification in summer and the discoloration rate will slow down. If the water temperature exceeds 30 ℃ for a long time, the fish will lose its luster and become prone to tail scalding disease.

2, water quality requirements: mainly refers to the pH and hardness of the water, the best pH value in the discoloration stage of fish is 7.5-8.5, excessive alkali or acid will darken the color of fish. The best hardness of water body is 4 °10 °. If it is lower than 3 °or higher than 15 °, it will endanger the survival of goldfish.

3. Oxygen content requirements: the amount of dissolved oxygen in the water is also very important for the discoloration of goldfish, requiring that the dissolved oxygen in the water is more than 3 mg / L. the higher the dissolved oxygen is, the faster the discoloration is. If it drops to 1 mg / L, the goldfish will float its head, change color slowly and become dull. If you live in an outdoor fish pond with oversaturated dissolved oxygen for a long time, goldfish will get sick again and lose their ornamental value. The water for raising goldfish is usually well water, river water, lake water and tap water (dechlorination), which is rich in trace elements and is conducive to the division and increase of pigment cells on the body surface of goldfish. When goldfish are raised with clear water, the fish fry change color quickly, but the goldfish after discoloration is light but not colourful. If the goldfish are reared alternately with fresh water and green water, the color change is accelerated and the color is bright. The alternating period is generally about 30 days.

4. Light management: light directly affects the change of body color of fish fry. Although fish fry raised in indoor aquarium are exposed to light on all sides, the light is weak, which is disadvantageous to the discoloration of goldfish, so lighting equipment should be used. General aquarium can install 40 watts ~ 60 watts fluorescent lamps, turn on the lights for 6 hours and 10 hours a day. Outside the goldfish pond, the east and west sides should cover the sun to avoid direct sunlight to prevent goldfish from turning white.

5. Feed requirements: fish fry have more edible bait, but plankton is the best. The egg yolk of newly hatched goldfish disappears after 2-3 days, and some cooked egg yolks can be fed to rotifers after 7-8 days. If the body length is more than 6 cm, it can be fed to zooplankton such as water fleas, red worms and water earthworms. Practice has proved that the best food for discoloration is the hemoglobin larva, which is added with blood powder, insect powder and various vitamins at the same time. The red, golden and blue goldfish change color very quickly and shine brightly. In the feeding process, to control their food intake, generally controlled at 6: 8% full. If it is less than 40% or more than 80%, if the feeding time is long, it will be malnourished and cause the dysfunction of mucus secretion on the body surface, and the goldfish will get black and get sick.

Generally speaking, crucian carp is very easy to raise, as long as do a good job in water temperature, water quality, light and feeding and other management work can be successful. However, if it is the first time to breed, you can refer to the above method to breed.