1, change the water regularly.
You can change it once a week or so, half or a third at a time. Chlorine in tap water needs to be removed first. Carassius auratus lives in an environment with poor water quality and is easy to die. When excess food remains in the water, it should be cleaned up in time. Attention should be paid to the prevention and treatment of infectious diseases, and it is best to disinfect the fish tank regularly to prevent problems before they happen.
2, proper oxygenation
If there is too little dissolved oxygen in the water, crucian carp will die easily. Therefore, when raising crucian carp, aerobic pump should be prepared in advance as far as possible, so that it can be replenished in time when lacking oxygen, so as to avoid some crucian carp from dying due to lack of oxygen.
3, reasonable feeding
Culturing crucian carp, if unreasonable feeding, such as overfeeding or not feeding for a long time, will cause certain harm to the health of crucian carp. Generally speaking, crucian carp can be fed about twice a day. The feeding amount should also be paid attention to and adjusted according to the size and quantity of crucian carp. Fish is an animal that can't eat enough. Reasonable feeding is the most basic. It's better to feed less than more.
Introduction of crucian carp
Crucian carp is a warm-water fish. Carassius auratus likes to move underwater. Crucian carp has strong adaptability to hypoxia and is an omnivorous fish. The feeding habits of young fish are similar to those of adult fish. Adult crucian carp mainly eat organic debris, aquatic plants and plant seeds, as well as a considerable number of chironomid larvae, cladocera and copepods, as well as commercial feed. Crucian carp is a kind of fish that lays eggs repeatedly. Carassius auratus is distributed in all major rivers and lakes in China except Qinghai and Tibet. Introduced to North America, Europe, Africa, India, South Korea and Japan.
Crucian carp can be found almost everywhere in rivers, lakes, reservoirs, ponds, mountain ponds, swings, ditches, swamps and large and small water bodies full of weeds. Carassius auratus is one of the typical bottom fishes with strong adaptability. It can survive in water with pH value of 4 or 9, even in mineral water, sewage and industrial and mining wastewater. In addition, it can resist severe cold (such as-10℃ to-15℃) and has strong endurance in hot summer climate and low oxygen environment.
Refer to Baidu Encyclopedia-Carassius auratus