What happened to the Japanese koi fish who died of illness?? Urgent help

Bacterial diseases.

**Inflammatory congestion.

1)**: Most of the diseases are large fish and more than one year old koi, late spring to early autumn is the epidemic season, which can cause a large number of fish to die. When the water temperature is 20 to 30 degrees, it is most likely to be epidemic, and when it is below 20 degrees, there will still be a small number of diseased fish, and continue to die, this temperature range is also the peak season for fish growth, so it is very harmful.

When the temperature drops to about 10 degrees, the disease no longer occurs, and this law can be used to control the temperature of the diseased fish**.

2) Symptoms: **Inflammation and congestion, more common around the orbit, gill cover, abdomen, caudal peduncle, etc., sometimes the base of the fin bar is also congested, and in severe cases, the fin bar is broken. The scales of diseased fish are usually intact and do not fall off.

Diseased fish float on the surface or sink to the bottom, swim slowly, react slowly, and have poor appetite.

3)**: Koi carp were soaked with furacillin or furazolidone 20mg kg concentration. When the water temperature is below 20 degrees, soak for 20 30 minutes; At 21-32 degrees, soak for 10-15 minutes for prophylaxis and early **.

Sprinkle the whole pool with furacilin or furazolidone concentration, and the concentration can be increased in severe cases, which can be used for prevention and early **.

Wash the fish body with erythromycin 2 concentration, the water temperature is below 34 degrees, soak for 30 50 minutes, once a day, for 3 5 days, until the condition improves.

Streptomycin or kanamycin is injected with 120,000 IU per kilogram of fish, usually only once, and a second injection on the fifth day if the disease is severe.

Oral administration with haloperic acid (norfloxacin), powder per 10kg of fish body weight per day, once a day, for six consecutive days.

Immersion with livanol 20 mg kg concentration, when the water temperature is 5 20 degrees, immersion for 15 30 minutes; Soak at 21-32 degrees for 10-15 minutes. As an early ** effect is significant.

Sprinkle with rivanol concentration all over for special effects.

Using the above treatment methods at the same time as a saline bath, the effect is remarkable.

Soak the fish body with nitrofuracillin concentration for 30 min.

I would like to ask if your house was renovated before you moved? And then again.

First, water quality problems.

Some cities have poor water quality, the water plant uses a lot of sterilization and detergents, the fish will be poisoned if they are not adapted, so there are skills such as drying water, waterfall, breaking into the tank, in fact, the most easy to make fish poisoning is the chlorine in the water, new water with an appropriate amount of dechlorinated water is a good way to quickly solve the problem, but be careful not to overdose.

Second, the temperature difference of water.

This problem is most prominent in the cold weather, koi can survive in the water temperature of 2 35 degrees, but the adaptability to the change of instantaneous water temperature is very poor, more than 3 degrees is easy to sudden death, when the weather is cold (most of the time in the north) the temperature difference between the tank temperature and the tap water temperature is larger, this is a big problem for the koi, not careful! In case of emergency, hot water can be added to cold water from a water heater and temperature measurement with a thermometer.

3. The accumulation of ammonia in fish feces reduces the physique of fish and causes chronic poisoning.

In fact, the accumulation of ammonia in fish feces not only causes the decline of fish physique and chronic poisoning, but also breeds a large number of various germs, which is one of the main causes of fish diseases, and there are several ways to solve the problem:

1. Choose feed carefully: The biggest problem with feed is that spoiled animal bone meal and carcasses are added during production, and do not choose rotten and fragrant feed.

2. Add salt: Adding salt to new water can inhibit the growth of some bacteria and provide salt for the normal metabolism of the fish itself.

3. Dosing: Fluoropinene acid is two grains per 100 catties of water, once a week, it is a broad-spectrum bactericide, low toxicity, and most of us have diarrhea to eat this.

4. Add nitrifying bacteria to decompose pollutants in water, feces and residual feed, and the bacteria lose nutrients.

5. Strengthen filtration.

Treatment of the fish tank: put an appropriate amount of potassium permanganate powder to make the water in the fish tank pink;

Soak for two days and then let go and rinse off. Cool for two days and then put new water;

After receiving the new water, it is difficult to continue stocking ornamental fish.

Prevention and control of fish disease symptoms: Other bacterial infections such as gill rot, blindfold, water mildew and deterioration of water quality in ornamental fish will cause symptoms like the fish disease you described. The fish in the fish tank do not need to be fished out, and nitrofuracillin powder can be put in normal management.

Suggestion: When new fish is purchased, it is best to disinfect and sterilize with 3% brine for 15-20 minutes. In order to avoid carrying germs into the fish tank and causing re-infection of ornamental fish.