My koi lower fin is a little red, it seems to be rotten, please consult the masters.

How can you raise fish well? In fact, everyone has their own experience of raising fish and will have their own ideas. I think the most important thing to keep fish is to do our best to maintain the balance of the ecological environment in the fish tank.

The so-called biochemical filtration of fish tank is the process of decomposing and converting harmful substances such as fish excrement into harmless substances through nitrifying bacteria that are epiphytic on the tank wall, filter material, bottom sand, biochemical board, biochemical ball, aquatic weeds, etc.

Fish can only be healthy and less sick if they live in a good water environment. The living environment is very important for all living things, and everyone knows that a newly renovated house needs to be vacant for a period of time before it is suitable for habitation. People who work in chemical plants can retire at the age of 45, which fully demonstrates the importance of the living environment to people's health.

Some harms do not manifest themselves all at once, but have a process of accumulation. If one day you find that the fish that used to be active have become listless and anorexic, it usually means that there is a problem with the water in the tank, which usually starts with the fish with a weak constitution.

The quality of the water in the fish tank is really important to the fish, and the relationship between the fish and the water is like the relationship between people and the air. Imagine what it would be like for a person to eat and pull in a room without an exhaust fan or flush toilet. If you are in a room with an exhaust fan and a flush toilet, the situation will certainly be satisfying.

So what is the "exhaust fan" of the fish tank, that is, to change the water. Even if an intact ecosystem is established in the fish tank, it is necessary to replace the water in the tank frequently and as necessary, and to increase the activity of the water by replenishing it with new water. As for the "flush toilet", there are two kinds: manual and automatic, manual is to use a straw or sand washer to clean up the solid waste at the bottom of the tank by hand, and the automatic is the automatic extraction function provided by Yongqing filtration.

On the one hand, the Yongqing filtration system provides a large area for cultivating nitrifying bacteria in the tank, and on the other hand, it is actually an automatic "flush toilet" for the fish tank. So that you can enjoy the fun of fish farming more easily. If you want to know more, please Yongqing Filtration.

Or take it out and raise it again, wait for it to get better and then put it back, so as not to infect other fish, the microbial ecosystem can help you give the fish a good environment, fish ponds, fish tank fish farming problems can come directly to me, I hope it can help you,

Be sure to change the water in time, and then spray some disinfectant properly, and you can also wipe the surface of the fish with alcohol. There is a good chance that there are too many bacteria in the water.

Change the water in time: The first thing a koi fish fin rots is to change the water. Whether caused by bacteria or parasites, changing the water can reduce its levels and improve water quality, thereby reducing the likelihood of deterioration of the fish's condition.

Increase the temperature: After changing the water for the koi, the next thing to do is to increase the temperature, usually by 1-2°C. Add salt to taste

In order to alleviate the *** caused by warming, it is necessary to add an appropriate amount of sea salt to the water body.

Your fish has a common ailment in aquarium fish, which is skin mold. It is also known as water mildew and white hair.

Pathogen] is water zero.

Genus, Sponge Mold, Isomold, Mycelium spp., Pythium spp., etc.

Symptoms] When fishing and transporting ornamental fish, a little carelessly, the fish body is injured, or parasites invade and destroy, the spores of mold invade the wound, absorb nutrients, germinate quickly, one end of the hyphae goes deep into the muscle, and one end grows outward, forming cotton wool-like hyphae. When mold is just parasitic, it is not easy to detect with the naked eye; By the time the naked eye sees it, the hyphae have invaded the wound on the fish's body and are growing from the outside to the inside. The hyphae are entangled and adhered to the cells and tissues of the wound, causing tissue necrosis.

Due to the increasing number of cotton wool-like mycelium, the fish body is overburdened, causing swimming disorders, loss of appetite, and becoming thinner and weaker, resulting in death.

When ornamental fish are infected with mold, they are also affected by the length of time they are exposed to light. Prolonged periods of rain or lack of indoor lighting, daylight, etc., can all contribute to the growth of mold. The body of the fish infected by mold is usually covered with a layer of white pannus, especially the black and red fish are the most obvious, thus losing the luster of the fish body.

Subsequent sluggishness, often sluggish, floating on the surface of the water, if not timed**, the fish body mold spreads, the affected muscles rot, loss of appetite, and eventually lead to death.

**Method] Dermatomycosis can occur all year round, with early spring and late winter being the most common. In order to prevent the occurrence of water mildew, attention should be paid to prevent damage to the fish body and parasite bites as much as possible during operation, and a small amount of coarse salt can be put into the water to inhibit the occurrence of water mildew.

When the fish is found to be infected with water mold, it can be soaked in 3 salt water, 1 time a day, 5 10 minutes each time, or soaked in potassium permanganate solution of 2 parts per million (2 ppm) plus l salt for 20 30 minutes, or soaked in malachite green solution of 1 to 2 parts per million (1 2 ppm) for 20 30 minutes, or soaked in 1 to 2 parts per million (1 2 ppm) of methylene blue solution for 20-30 minutes, or soaked in 5 parts per million (5 ppm) of nitrofuracillin solution, Or splash 0.02 parts per million (malachite green solution) and 0.3 parts per million (formaldehyde solution directly into the aquarium to inhibit the growth of mold.

It can also be used to increase the water temperature to inhibit the growth of water mold. Installing a 15-watt UV lamp on the top of the aquarium for several hours a day can effectively inhibit or eliminate the growth of water mold.

**Before confirming the symptoms, the performance characteristics of koi rotten fins and tails in the onset period: first, the edge of the fin will appear slightly opaque at the beginning, and then the membrane will continue to fall off, exposing the fin spines, and the fin spines will crack in turn, and then not**, it will cause the death of koi fish.

**Method: a, put nitrofuracillin powder gram in 100 kg of water for soaking and disinfection, and the condition can be relieved after multiple doses.

b, put 3 5 tablets of dysentery in 100 kg of water, soak the diseased fish for 30 minutes.

c, put oxytetracycline 5 8 tablets in 100 kg of water to soak and disinfect, can prevent infection with this disease.

d. Wash and disinfect with a low concentration of potassium permanganate solution.

Dip with gentamicin and place 2 sticks in an aquarium of 100 cm x 50 cm x 35 cm.

If you can't find fish medicine for a while, you can go to the pharmacy to buy diarrhea and diarrhea (skin and pillage testosterone), find a small tank of medicinal baths, add 8 tablets to a 40cm tank (slowly dissolve in water), and inflate at the same time. If the water temperature is raised to 30 degrees Celsius for tropical fish, add half of the pills the next day. Usually within a week**.

There is also a slight koi rot gills and rotten fins under the salt will have the effect of relieving the condition, but if it is slightly severe, it needs to be carried out with professional drugs** to prevent the spread and deterioration of the disease.

For more serious rotten fins and tails, the incomplete part should be cut with scissors to make it smooth and then use the above **method**.

There are a lot of blood streaks on the body, in fact, this is a symptom of congestion, there are many kinds of fin congestion**, but in summary, it is nothing more than the deterioration of water quality, temperature changes, bacterial infections, fright, etc. This way of changing the water is inherently wrong, which will reduce the physique of the sick fish and cause physical discomfort, thereby increasing the possibility of disease. Here's how:

1. If it is the stress response of new fish, you can choose salt and then add a small amount of VC mixed in the water body, temporarily recuperate for 1 week, if the head condition can also add the concentration of Livanol solution in the water.

2. If the koi fish body is caused by trauma and infection bacteria, the koi fish fins are bloodshot, the diseased fish can be fished out, soaked in potassium permanganate solution with a concentration of 15ppm for about 10 minutes, and then temporarily raised for 1 week according to the steps of method 1.

3. You can also slowly recuperate, the way is to use the old three kinds + yellow powder. Change a small amount of water every day, raise the temperature to 28 evenly, add salt, the concentration is, the next amount of yellow powder (a small amount), and burst oxygen. Quiet recuperation. About two weeks will be fine.

I recommend using the third way** Koi fish have blood on their fins, because the drugs are all chemicals, which are more or less harmful to koi.

The body surface of the koi fish is "congested", and the teacher teaches you a trick to solve it.

Or is it because the water quality is not good, you are doing the right thing. Koi fish are all the same in the early days of illness. Salt, heat, and oxygen.

You can go to the vet and get some potions.

Oh, and if this manager is not dead, he can use the method of dripping water, you can help him put out the fire, and then take him to the pet hospital.

The case of LZ is water mold, white hair, the pathogen is water mold and cotton mold, the mycelium form is slender, and branched, they are like roots at one end, born in the body surface of the fish, and the rest are exposed outside the body. The hyphae are up to 3 cm long, grayish-white, and soft like cotton wool. At the beginning of the disease, the mucus on the body surface of the sick fish increases, forming a layer of white pannus.

In the later stages of the disease, the hyphae penetrate deep into the body surface**, and the mortality rate is very high. Prevention and control methods: H-2 special sterilization + a little large grain salt + water temperature 31 degrees medicated bath can be selected.

Oxytetracycline 100 L water 5 tablets medicated bath daily change water 1 3 tonics. Large grain salt (3 g liters) + 31 degrees Celsius for 2 days to change the water and do not want to concentrate. It takes several doses to heal.

The factors of hemorrhagic disease in fish are complex, and are generally caused by viral, bacterial and environmental factors

1 Viruses, bacteria (generally believed to be caused by Monomonas) and parasites infect the fish body, causing damage to the whole body or part of the fish.

2 Water quality relationship Whether you use tap water to raise fish, or fish from lakes or wells, you need to stand or be exposed to the sun for 2-3 days before you can use it. If used directly without treatment, it can cause blood congestion on the fin scales and fatality for goldfish.

Symptoms] circumferential fins (more severe at the base), interscaly or local hyperemia, hemorrhage, ulceration, scale detachment; In severe cases, there is bleeding in the mouth, eyes and internal organs, the sick fish floats or sinks to the bottom and swims lazily, the light ones lose their appetite, the severe ones refuse to eat, the body color is dull, the emaciation increases, and the secretions increase, and they are complicated by bacterial water mold disease and sepsis and die.

Onset season] can occur all year round, especially from June to October.

Prevention and control methods] 1) In addition to paying attention to the prevention of the above-mentioned ** genres, check for parasites at the hemorrhage, and catch them. At the same time, rub the affected area with red mercury, then rinse it in a small basin and then put it back in the original pool (tank) to rest, once a day, until it is cured.

2) Put the sick fish into 10-20 milligrams of nitrofuracillin or dysentery solution or 2-3 saline and soak it for 10-15 minutes, then wash it into the pool (tank) once every other day.

3) In severe cases, add 1 million units of kanamycin or 80,000 to 160,000 units of gentamicin in 10 kg of water, and rest the sick fish in a water bath for 2-3 hours, and change to new water after half a day. 1 time a day, usually 2-3 times to heal.