What should I do if the fish in the fish tank have dark spots?

Generally, it doesn't have any effect. You can leave it alone.

The so-called dark spots may be discoloring.

Causes of discoloration: 1. The early and late discoloration of goldfish is greatly affected by genetic factors, and the early discoloration of broodstock is the early discoloration of offspring; Conversely, the offspring will change color later. That's why experienced fish farmers always keep goldfish that change color early as their parents. Environmental factors have a great influence on the discoloration of broodstock.

2. Water temperature. Generally speaking, the water temperature is high, the fish change color quickly, usually it takes 15-20 days to complete the whole color change process, and there are as long as half a year.

Three rays of light, light through the goldfish's visual stimulation nerve center, thus affecting its fading. Goldfish raised in low-light environments or in black containers have a darker body color after fading; On the contrary, the fading is early and fast, and the body color after fading is also light; Goldfish raised in clear water for a long time fade early, while goldfish raised in thick green water fade late, so the juvenile fish breeding process should increase light and improve water quality to promote goldfish to excel early.

4. Nutrition: Experiments have proved that nutrition can also affect the fading of goldfish. The juveniles that are often fed daphnia, mosquitoes, small shrimp and other animal bait fade quickly, and the body color is bright, while the juveniles fed with pellet feed, rice, noodles and other commercial feeds fade slowly, and the color formed is not as good as the former.

In addition to the above, these are the key.

The body color of a goldfish changes three times during its lifetime. Stage 1: Discoloration at the fry stage. Stage 2: Decolorization at the juvenile stage. Stage 3: Fading in old age.

Goldfish are "chameleons", and their basic color gradually changes with the development of their bodies, and they will change color several times in their lifetime, which often causes confusion among beginner fish farmers. It is often reported in the newspapers that someone bought a few black goldfish, and after months of raising, turned red, thinking that something was wrong.

In fact, this discoloration of goldfish was discovered a long time ago.

Black spot disease, which is most susceptible in spring and autumn, has a strong seasonality Note that if it is a cold-water fish like a goldfish, it cannot be warmed up, and it can only be medicated. Due to the large temperature difference between day and night, tropical fish are most readily available in fish tanks without thermostats.

Generally, the reasons for the appearance of dark spots in fish are as follows: 1 Fish will appear black spots when they are frightened, and they will disappear after a period of time. 2. If the water quality is not good or the water quality is not suitable, the water should be changed when the water quality is not good, and the water should be changed immediately if the water quality is not suitable.

It is a symptom of fish sickness, if it is not due to the feeding problem, it is a problem with the water quality.

It is recommended to go down to the fish tank after the potassium permanganate is lifted up.

Tips for feeding.

1. If there is no condition to maintain the water temperature of the fish tank, you should often give the goldfish enough sunshine in this cold winter.

2. Put some white rice stones and some aquatic plants in the fish tank, but remember that the aquatic plants must be appropriate. 3. In terms of feeding, you can throw some fish and insects or white-flour steamed buns, but you should feed less and feed them frequently each time.

There are many reasons why fish have dark spots. It may be because you have been frightened and need to rest for a while to recover. It can also be due to fluctuations in water quality, which requires regular water changes to improve the condition of the water body.

If you suffer from black spot disease, you need to use large white slices**, but the average fish can directly give up buying new ones. In addition, if the fish do not pay attention to shading during the discoloration period, they will also develop dark spots. <

Black spots on a fish are not necessarily sick, but they may also be frightened and caused a stress response. In view of this situation, you don't need too many ** means, as long as you rest for a period of time, you must avoid being frightened again during the period, and reduce the impact of light and noise on it.

If the water quality is not suitable for the fish, such as too high hardness, too low dissolved oxygen, or pH problems, it may also cause it to develop dark spots. In view of this situation, you only need to change the water regularly, improve the state of the water body, and let it slowly adapt to recover, but do not change too much each time you change the water.

Black spots can also be black spots, which will cause the fish to be thin and weak, and the color of the body surface will be dull, and even affect its sail breathing, generally due to parasites, you can use large white flakes**. However, the cost of sending ** is very high, so it is not a very expensive fish, and it is not recommended to carry out **.

If the fish grows in a sunny place, environmental factors will also make it have some dark spots, which is not a disease, but may affect the ornamentality, so it is best to pay attention to shade and avoid direct light as much as possible, especially the discoloration period of the fish, which needs to be raised in a cool place.

1. Drug poisoning, drug-poisoned goldfish will have dark spots on their bodies.

Measures: Heavy metal salts should be changed in time to change the water, should be raised in time, so that the metabolism of the fish is accelerated, so that the toxic substances in the fish body are eliminated faster, but it should be the situation, if the situation is serious, you should go to the doctor in time to ask for medicine.

2. Water quality problems, water quality problems can be divided into two aspects, one is the aging of water quality, and the other is the sudden change of water quality. The former is due to high ammonia nitrogen in the water body, and the latter is due to the large seasonal temperature difference.

Measures: First of all, change the water in the fish tank to see how the situation is, and at the same time disinfect and sterilize the fish tank when changing the water, so as not to leave pathogenic bacteria and do useless work, and give the goldfish a healthy and sterilized sterile environment. Secondly, after the diagnosis, the targeted **, for goldfish sterilization and disinfection, you can use potassium permanganate solution for medicated bath, the general medicated bath time is about 15 minutes, of course, during this period, according to the adaptation of the goldfish to determine the time of the medicated bath.

3. Caused by the disease, the main cause of goldfish black spot disease is that when fishing and transporting goldfish, the fish are injured by friction, and the fish body is injured by external injuries or parasites so that the fish is invaded by mold spores and infected, thus inducing black spot disease.

Measures: Do a good job of preventing black spot disease in daily life, such as being careful when fishing and transporting, so as not to injure goldfish and avoid being infected by parasites and germs. At the same time, a small amount of salt can be put into the aquarium where new fish are stocked to inhibit the occurrence of water mold, and attention should be paid to cleaning and disinfection when putting hungry live bait, so that the rotten water can also better keep the water clean, isolate the growth of water mold, and prevent goldfish from being infected with black spot disease.

If the goldfish is unfortunately infected with black spot disease, then you can try to use 250 grams of salt and 250 grams of baking soda mixture to sprinkle on a 100*55*45 cm fish tank, you need to insist on a few days of medicinal bath, the effect is very significant.

Understand the TV network

The cause of dark spots on a fish may be caused by illness.

When their bodies are damaged by friction during transportation, the wounds on the body are extremely susceptible to bacterial infection. At this point, there is a risk of melanoma. When a new fish comes home, because the water transfer method is not right, or the water quality at home is very different from the water quality in the aquarium store, causing the pet fish to be extremely unsuitable for your water, as a warning, your fish will appear on the surface of the body with this kind of dark spots.

Or if you don't change the water for a long time, you will also have dark spots.

Timely grasp the individual isolation and breeding, and use malachite green solution medicated bath**. Generally speaking, the concentration of the medicinal anti-slippery celebration is relatively good. Soak for 10 to 15 minutes each time, once a day.

Their dark spots will heal in about a week. In order to prevent it from making wax sick due to sudden changes in the water quality environment, the water exchange at this time should be controlled. Each time the water is changed to about one-third of the water in the fish tank, and the water is changed three times a week.

Precautions for fish farming

Pay attention to the water for raising fish, the general household tap water is OK, but there is chlorine in the tap water, we need to use a fish tank or other basin filled with water to fill the tap water and let it stand for at least 24 hours, and wait for the chlorine in the hand to volatilize, so that it is healthy. Pay attention to the feeding of the fish, the fish is not afraid of hunger but not full, if you keep feeding the fish will keep eating until you die, feed the fish normally about 2-3 days on the line.

It is best to use soda water to clean the fish tank, if you don't have it, use clean water or tap water, and never use soap or dish soap to clean it. Filtration must be there, but not as big as possible, considering the tolerance of the fish and grass. If you find that there are abnormalities on the body or head of the fish, or white spots or yellow spots, it may be that there are too many bacteria in the water, and you should sprinkle some sterilizing salt on the abnormal parts and change the clear water in time.