Is it normal for koi fish to have black stools, what is the reason for the blackening of koi fish Wh

The color of koi manure varies according to the fish food fed, such as pellet feed, puffed feed, self-formulated feed, bread, steamed bread, rice, vegetables, etc. Generally, the feeding is puffed material, and the discharge of black or dark feces is normal, if the feces are light or gray-white feces, it proves that the amount of food is too much, the koi has indigestion, or the koi has an intestinal infection. It is recommended to put less feed in fish tank breeding koi to avoid indigestion and deterioration of water quality!

The condition of black stools in koi fish may be normal, usually due to the influence of pigments in the food. However, if the stool appears to be long in shape, it can be a sign of indigestion, which needs to be taken care of. In addition, if the water temperature increases, it may also cause the stool of the koi fish to become darker.

It is advisable to pay close attention to the feces of koi fish and whether there are other abnormal manifestations, such as shortness of breath, scale shedding, etc. If there is any abnormality, it is recommended to seek professional advice in time.

The reason why koi fish should be kept black is to make the fish tank more ornamental.

In daily fish farming, especially aquarists who raise koi, there will always be a black koi in the tank, also called black carp, black carp. The black fish in the tank and other body color of the fish, in the color will form a sharp contrast, such as after the fish tank lights on, the fish in the fish tank, the color is very bright, there is a black fish, can enhance the overall ornamental nature of the fish tank.

Black koi

The black koi is called black carp, which is the original species of koi and belongs to the variant carp. The black carp is a branch of the light yellow real carp, the whole body is much darker than the real carp, the whole body is like painted with black paint, the huge black carp has a high ornamental value, so many people also like to keep it at home.

How are koi fish farmed?

1. Fish tank requirements

If you use a glass fish tank to raise koi fish, the tank body should be relatively large, at least 80 cm or more. In addition, the fish tank should be equipped with a powerful filtration system, it is recommended that 20% of the space is placed in the filter cotton and biochemical cotton for simple physical filtration, and 80% of the filter tank space is used to put the ceramic ring of the bacterial house, because the metabolism of koi fish is relatively large, so the ammonia nitrogen conversion in the water is more frequent, so more nitrifying bacteria are needed to deal with it.

2. Choose big fish

When raising koi fish, it is best to choose big fish, because small fish have poor resistance and are easy to die if they are not raised well; The big fish has strong resistance and a relatively large fault tolerance rate. Generally, novices raise koi, and it is best to start raising fish between 25 cm and 40 cm. When we select, we can observe its activity, and we know that koi fish have the habit of jumping.

The more robust the koi, the easier it is to jump from the tank, or swim fast and brightly colored, then such a fish is healthy and high-quality.

3. Feeding management

Because koi fish have no stomach, it is generally necessary to eat small and frequent meals when feeding koi, and it is recommended to keep it for about 3 to 5 minutes as much as possible when feeding koi. There are many things that koi fish can be fed, but if you want to raise koi well, you must feed special feed. Koi feed is generally divided into five types: enrichment, breeding, color, germ and staple food.

4. Pay attention to water change

Koi carp have strong adaptability to water quality, but it is still necessary to pay attention to changing the water, in addition, koi are most afraid of sudden changes in water temperature, when the water temperature suddenly rises or drops by about 6 degrees, koi may die immediately. Therefore, when changing the water, be sure to control the temperature difference and do not exceed 3 degrees. In addition, excessive levels of ammonia nitrogen and nitrite in the water can also cause koi poisoning, and in severe cases, it will lead to direct death of koi.

If conditions permit, increase the biological filter tank and add more filter media to improve the filtration effect.

1. The koi fish turn black because the koi has black spot disease.

2. Black spot disease: Black spot disease, also known as black spot disease, is caused by the fluke of Pijuxin, which is also considered to be the fluke of Pijustem and other varieties.

3. The first intermediate host is the vertebral snail, in which there are various developmental stages of the maternal larvae, daughter larvae and cercariae, and the cercariae are forktailed.

4. The second intermediate host is fish, which develops into cysts in the fish. The body of the diseased fish is emaciated, the body surface and fins, gill covers, jaws and other parts are covered with black spots, and the hand is rough to the touch, and in severe cases, it can cause the fish body to bend, and even the spine to bend.

This is grass gold, the gills are blackened generally because the ammonia nitrogen content in the water is high and the fish gills are injured, and they are infected with germs, and there is a drug in the water, the concentration of the medicine is high, especially under the chlorine dioxide effervescent tablets, this strong oxide is easy to make the fish gills injured and inflamed, and then infected by bacteria, fish must learn to raise water, raise water, water is non-toxic, whether it is bacteria or viruses or parasites can not hurt the fish, you can go to a professional teaching you to raise water in the post, may be able to help you a lot.

First of all, it is important to confirm whether the black color is the natural color of the koi fish or the blackening caused by the lesion. If the lesion turns black, it is black spot disease, but it is not a common parasitic disease, black spot is the cyst containing the intestinal fluke in the larval stage, there is a heavy pigment in the cyst, once infected with the formation of black spots, even ** will leave traces, it is difficult to recover completely. **The solution is to kill the parasites with an anti-parasitic treatment agent, and you can also use trichlorfon, which is used on the instructions, and the effect can be better with a salt bath.

However, it is a little strange that this black spot disease generally only occurs in fish farms, and it is rare to raise koi fish at home.

Koi fish breeding attention to the problem.

1. Feeding density Before raising koi, we should first consider the size of the feeding container and the number of mantissa that can accommodate koi. The main reason for the viewing of koi is its gorgeous color, strong body, elegant movements and beautiful posture of group swimming, and the koi fish must be viewed from the back, that is, obliquely upward, and it is much inferior if viewed from the side. In order to fully meet these conditions, only garden ponds are raised.

But as a city dweller, not everyone has a garden, so they have to replace it with an aquarium. Regarding the feeding density, it is necessary to adjust the size of the container, the amount of water, the temperature of the water, the state of oxygenation, the size of the fish and the growth of the fish. 2. Variety matching When raising in the garden pool, it is generally matched with red and white, Taisho tricolor, Showa tricolor, ** or platinum, autumn water, light yellow, etc.

In the aquarium, people can only see the side of the koi, and you can choose the varieties of fish body reflection such as **, platinum**, pine leaf**, mountain blowing** and other koi, and then match the German carp. However, whether they are kept in a pond or aquarium, most of them are brightly colored koi, supplemented by darker, shiny and elegant ones. 3. Bait method Koi fish are omnivorous fish, animal or plant bait can be fed, such as daphnia, earthworm, shrimp, corn flour, biscuit crumbles, instant noodles, vegetables, and even rice balls can be fed.

However, in order to make the koi fish colorful, in addition to matching the lighting, background and water quality, it is more important to feed the high-nutrient special koi to enhance the color of artificial feed, which is flake or granular. The bait can be delivered in a single or alternately. Koi fish are greedy eaters, and if they feed too much, they will suffer from food accumulation or constipation.

Therefore, it is necessary to pay attention to the number and frequency of bait, and take the principle of eating less and more often, no residual bait and bad water. For hatched juveniles, rotifers, daphnia or egg yolks can be fed at first. Small fish about 2 cm old should be fed bait such as bloodworms.

For fish that grow to more than 5 cm, you can eat animal or vegetable bait casually.

The black five-colored koi fish will become darker in black. Because the five-colored koi is also one of the variant carp. Therefore, the black five-color koi fish will become darker.

As a kind of hidden bush noisy variant of the koi species, the appearance of the five-color koi can be said to be very ancient, and the five-color is derived from the five-color light yellow, that is, light yellow.

The five-color light yellow is called the five colors because of its chaotic color overlap, and it is also said that the five colors are not only five Zheng Huai colors, but a variety of colors overlapping, and then gradually developed into the current five-color koi.

Five-color koi fish requires water temperatureThe five-colored koi do not have strict requirements for water temperature and quality, and the turbidity of the water in which they live ranges from 2 to 30 degrees Celsius. Although it has strong adaptability to the environment, it has the weakness of not being able to resist the sudden change of water temperature, such as long-term artificial breeding, the turbidity of the water can be tolerated when the water rises and falls by 2 to 3 degrees Celsius, and the temperature drops or rises by more than 2 to 3 degrees Celsius.

The blackening of the scales of the koi fish may be caused by the deterioration of the water quality, so the koi fish should be immediately removed from the original tank and sterilized and disinfected. The blackening of koi fish scales may also be caused by changes in water temperature, so you need to use a heating rod to keep the water temperature at about 25. It may also be caused by an infected germ, in which case the sick fish should be removed and subjected to a medicated bath**.

The blackening of the scales of koi fish may be caused by the deterioration of water quality due to long-term water failure. At this time, the koi fish should be immediately removed from the original fish tank, and the fish tank should be sterilized and disinfected, and then the koi fish should be put into the tank for maintenance.

Koi fish scales blackened, may also be caused by changes in water temperature, the water temperature is too low during breeding will lead to a decrease in koi fish appetite, and the whole body blackened, at this time you need to use a heating rod to warm the water, and keep the temperature at about 25.

The blackening of the scales of the koi fish may also be caused by the infection of germs, so the diseased koi fish need to be fished out and raised separately. And put oxytetracycline tablets in the tank for **, soak for 30 minutes every day, and generally heal in about 1 week.