How to kill trash fish in a pond

There are eight ways to clear it.

1. Clear the pond thoroughly. Before stocking the fry, drain the pond water, clear the pond with quicklime, strong chlorine and other drugs, and completely kill wild trash fish, snails, aquatic insects, bacteria and parasites, etc., which is very beneficial to stocking fish fry.

2. Water filtration. Water filtration can effectively control the number of trash fish in the wild. Especially for fish fry and fingerling ponds, the inlet water should generally be filtered, and the filter mesh is made of 2 mm mesh polyethylene or yarn silk material, which can stop trash fish, eggs, aquatic insects, etc.

You can also put the fry into the cage, and filter the fry with a screen whose sieve eye is slightly larger than the thickness of the domestic fish.

3. Exposure to aquatic weeds. When feeding aquatic plants in the fish pond, the aquatic plants should be exposed to the sun for 1-2 hours, or the aquatic plants should be soaked in 5 milliliters of copper sulfate solution for 2 hours to kill the fish eggs and small trash fish and shrimp attached to the aquatic plants.

4. Set up a fish nest. During the breeding season of domestic fish, fish nests are set up in fish ponds with tree roots and aquatic plants, so that wild trash fish can spawn on the fish nests. If you find that there are eggs attached to the fish nest, you should remove the fish nest in time.

Or when wild trash fish lay eggs on the fish nest, splash trichlorfon, quicklime and other drugs to kill the eggs.

5. Biological clearance. Adult fish ponds with more trash fish, or second-instar fish seed ponds, can use ferocious black fish, mandarin fish, leather-bearded catfish, etc. to remove trash fish and small shrimp. Ponds must be able to be fished dry in order to control the population of ferocious fish and not to cause harm.

The size of the ferocious fish in polyculture should be less than two-thirds of the domestic fish, and no more than 40 fish at a time, otherwise the domestic fish will be harmed.

6. Round up wild trash fish. During the growing season, the whole pond or part of the pond is pulled and fished, so that the pond fish are concentrated in the net in a short period of time with high density. Since the suffocation point of wild trash fish is lower than that of domestic fish, most of them will suffocate to death in a short time, and after most of the wild trash fish die, the domestic fish will be released back into the pond.

7. Polyculture carnivorous fish. Polyculture of carnivorous fish such as mullet, mandarin fish, yellow catfish, and largemouth catfish in ponds can not only remove wild trash fish, but also produce some high-quality fish, and improve the efficiency of pond aquaculture.

8. Use the method of suffocation. Wild trash fish consume more oxygen than domestic fish fry, and the method of reducing dissolved oxygen content can suffocate wild trash fish fry and leave domestic fish fry. Here's how:

Fill half a bucket of water and put mixed fish fry, due to the dense fry and the sharp increase in oxygen consumption, after a while, the wild miscellaneous fish will faint and faint, and then die one after another. The fry were also disturbed by the lack of oxygen, and after a while, they floated on the surface of the water one after another, tangled into clusters. At this time, the clumps of fry are left in a pot and placed in another bucket filled with fresh water, and when they sink to the bottom, it is the wild trash fry that die.

If the fry of wild trash fish have not been removed, and (may) take a second suffocation until the wild trash fish are dead.

Put fish and shrimp pots to remove some trash fish.

Summary. Efficacy and function of fish: 1. Lower blood pressure

Fish protein is rich in methionine and taurine, both of which contain sulfur amino acids, which can affect the regulatory mechanism of blood pressure, increase urinary sodium excretion, thereby inhibiting the effect of sodium salt on blood pressure and lowering blood pressure. 2. Strengthen the spleen and stomach: The muscle fiber of fish is relatively short, the protein tissue structure is loose, the water content is relatively large, the meat is relatively tender, and it is easy to digest and absorb.

Fish has the advantages of high protein, low fat, high vitamins, good taste, and has the functions of strengthening the spleen and stomach.

What medicine can kill the fish in the fish pond.

What medicine immediately makes the fish die.

Hello dear, rotena can kill the fish in the fish pond, it is a concentrated ingredient of rotenone. Rotenone is a ketone extracted from the roots of aquatic plant fish vine, which is generally used as a pesticide, and when the substance acts on the fish pond, a small amount can cause a large area of fish to die, so it is generally used cautiously on the edge of the fish pond.

Kiss, the fish vine essence can kill the fish instantly.

Efficacy and function of fish: 1. Reduce blood pressure: Fish protein is rich in methionine and taurine, both of which contain sulfur amino acids, which can affect the regulatory mechanism of blood pressure and increase the excretion of urinary sodium, thereby inhibiting the impact of sodium salt on blood pressure and reducing blood pressure.

2. Strengthen the spleen and stomach: The muscle fiber of fish is relatively short, the protein tissue structure is loose, the water content is relatively large, the meat is relatively tender, and it is easy to digest and absorb. Fish has the advantages of high protein, low fat, high vitamins, good taste, and has the functions of strengthening the spleen and stomach.

Is it OK with Croton?

Kiss, croton can also be, croton contained in croton is a coagulating toxin, which can make the blood of fish coagulate and die.

What medicine comes the fastest?

The water depth is about 3m. About five or six acres. How much croton do I need?

Kiss, the water depth is about 3m, about five or six acres, and 12 kilograms of croton are needed.

Kiss, the fish vine spirit is the fastest.

Summary. Generally, pyrethroid agents are sensitive to fish, such as: cypermethrin, cypermethrin, cyhalothrin, bifenthrin, fenvalerate, homeopathic fenvalerate, cypermethrin, ......

The big fish will definitely die, and the small ones will definitely die.

Yes, but when I was in Qingtang, the contract had expired, and I don't know what drugs were used, but it was not toxic to the human body, so please help.

Generally, pyrethroid agents are sensitive to fish, such as: cypermethrin, cypermethrin, cyhalothrin, bifenthrin, fenvalerate, homeopathic fenvalerate, cypermethrin, ......

But it's generally pesticides.

There is an option to hit with a motor.

Such fish are not going to die yet.

The first reason is that the flood pond causes the phenomenon of sudden degeneration of dead fish. Rural fish farming, showing that the dead fish in the pan pond are all dead fish with hypoxic floating heads in the fish pond. In the process of feeding, it is easy to present the situation of flooding ponds, sudden changes in water quality and early morning hypoxia floating head dead fish.

In the fish pond with high yield and relatively fertile water quality, in the high temperature season, phytoplankton overmultiplies, especially the large number of cyanobacteria, constitute lake indigo, also known as patina water, which constitutes a lack of nutrients in the fish pond, resulting in the death of cyanobacteria and sinking to the bottom of the water, and the pond water becomes clear and thin, and can smell the fishy odor. The death of cyanobacteria constituted a severe lack of oxygen in the pond water, and extremely toxic substances such as ammonia nitrogen, nitrite, hydrogen sulfide and other toxic substances occurred, resulting in the death of the whole pond of large and fine fish. Secondly, the water quality is more fertile, the density is higher, and thunderstorms in the afternoon or at dusk lead to severe hypoxic death of fish the next morning.

In addition, high-yield feeding, large amount of feeding at dusk, fish eat very much, digest food at night, and consume a large amount of water-dissolved oxygen, resulting in the death of hypoxic floating head the next morning. In addition, the high temperature in summer and autumn, the pond water is too fertile, the density is too large, the light is poor during the day, the oxygen consumption decreases rapidly, the water dissolved oxygen is too little, and the oxygen content is exhausted, resulting in the lack of oxygen the next morning and the floating head dies.

The second reason is the phenomenon of dead fish constituted by improper medication. Due to the fact that farmers often do not understand the nature and function of fish medicine, improper use methods and other reasons, resulting in the death of pond-raised fish, which constitutes a loss that should not occur. After clearing the pond, residual drugs such as sodium pentachlorophenol and other drugs are poisoned, and the fry are put in, and they will soon be poisoned.

Splashing bleach or other fungicides throughout the pond can also constitute the death of the fish.

The third cause is fish disease, poisoning and improper handling of dead fish. Fish die in large numbers in a short period of time due to sudden hemorrhagic diseases. Pond silt is too thick or fertilized properly, resulting in an overrun of ammonia nitrogen in the water, resulting in the death of fish species poisoning.

There are also in the spring of April and May, the saline-alkali layer rises, resulting in the increase of alkalinity in the fish pond, in the case of high temperature weather, the pond water is shallow, and the water quality is thin, and it is easy to cause death due to alkalosis. In addition, due to the careless use of organophosphorus pesticides, the pond water is polluted, resulting in fish poisoning.

1. Pantang: Dead fish in Pantang are generally more common in pelagic fish, such as silver carp and bighead carpFewer demersal fish floats, such as carp and crucian carp.

Poisoning: Poisoning and dying fish can occur regardless of the type of fish, even benthic carp, crucian carp or loach, which are extremely resistant to hypoxia.

2. Rescue measures to be taken in the event of flooding or poisoning.

If fish deaths caused by flooding ponds or poisoning are detected in time, there is a possibility of rescue and a chance to reduce losses.

The rescue measure for the pan pond is to inject a large amount of new water in time and start the aerator to increase oxygen. However, for the aquaculture pond with poor facility conditions, in the case of inconvenient water source and lack of aerator, high-efficiency aerator can be applied in time to save the emergency.

The rescue measure for the poisoned pond is to immediately inject a large amount of new water, release the old water in the pond, and inject it while draining until the fish pond is calm; However, for ponds with insufficient water sources, fish should be immediately fished, and the fish should be quickly transferred to non-toxic ponds or cages, and then transferred back to the original pond after the toxic water of the original pond is properly treated.

Fish mortality in fish ponds may be related to fish poisoning, which is usually related to the toxins produced by the bloom of harmful algae in the fish ponds, or may be mismanaged, such as nitrite poisoning, ammonia nitrogen poisoning, etc. It may also be caused by the deterioration of water quality and the lack of fish with high stocking density, so it is necessary to adjust the water quality as soon as possible and treat it as soon as possible. In addition, it may also be infected with a disease, which needs to be diagnosed quickly and prescribed the right medicine.

The fish pond died, there must be many reasons, if you die, you look at the specific reason for one, the reason to find may be the water quality tooth, etc., some reasons are caused.

Hello dear, I'm glad to answer for you, I'm your exclusive ** answer teacher, thank you for your patience! The way to deal with dead fish in the fish pond is as follows: the dead fish can be concentrated and buried deeply.

Burial should be done away from water sources, rivers, breeding areas and residential areas. The treatment methods are as follows: 1. Regularly do a good job of pond cleaning, dredging, and drying ponds every day, and disinfect the fish pond with quicklime to reduce the occurrence of dead fish.

2. Reasonably open the aerator to increase the dissolved oxygen in the pool, and turn on the aerator can play a role in volatilizing ammonia nitrogen in the water and reduce the occurrence of dead fish. 3. Water cultivation and fertilization, according to the water quality status, in accordance with the principle of less application and diligent application, mainly carbon source fertilizer, to promote the reproduction of algae and beneficial microorganisms in the water body. 4. Regularly sprinkle microbial preparations, cultivate high-quality flora, and decompose ammonia nitrogen through beneficial bacteria.

Hopefully, this service will help you <>