The soil in the fish pond can detect the residual flow of fish medicine

It is supposed to be grass carp hemorrhagic disease, which is caused by reoarcvirus infection. The main symptoms are: the sick fish swim alone on the surface, swim slowly, and do not eat.

The body color of the fish is black, and there are varying degrees of congestion and hemorrhage on the top of the head, jaw, mouth, orbits, operculum, fins and fin bases. Peel off**, the muscles can be seen to be punctate or plaque-like hyperemia and bleeding, and in severe cases, the muscles of the whole body are bright red. The main object of harm is grass carp, and the morbidity and mortality can reach more than 70-80%.

The epidemic time is from May to October, and the water temperature is 25-32 degrees Celsius.

Prevention and control methods: Strictly implement the quarantine system, and do not import or transport fish fry, fingerlings and broodstock with viruses. Remove excessive silt from the bottom of the pond and disinfect thoroughly with quicklime or bleaching powder.

Fingerlings are injected with freeze-dried grass carp vaccine before stocking or when passing through the pond. In the onset season, disinfect with chlorine dioxide, dibromohysterine, bromochlorohysterine or strong chlorine once every half month. At the onset of the disease, the whole pool is sprinkled with rhubarb, with 2 kg per mu per meter of water depth (rhubarb is first decocted with an appropriate amount of water for 15 minutes).

Every 100 kilograms of fish are fed with kilograms of rhubarb, skullcap, cork, banyan root and other Chinese herbs (alone or in combination), and kilograms of salt mixed and mixed feeding for 7 days. You can look at the thriving fish medicine should be grass carp hemorrhagic disease, which is caused by reovitrovirus infection. The main symptoms are:

Sick fish swim alone on the surface of the water, swim slowly, and do not eat. The body color of the fish is black, and there are varying degrees of congestion and hemorrhage on the top of the head, jaw, mouth, orbits, operculum, fins and fin bases. Peel off**, the muscles can be seen to be punctate or plaque-like hyperemia and bleeding, and in severe cases, the muscles of the whole body are bright red.

The main object of harm is grass carp, and the morbidity and mortality can reach more than 70-80%. The epidemic time is from May to October, and the water temperature is 25-32 degrees Celsius.

Prevention and control methods: Strictly implement the quarantine system, and do not import or transport fish fry, fingerlings and broodstock with viruses. Remove excessive silt from the bottom of the pond and disinfect thoroughly with quicklime or bleaching powder.

Fingerlings are injected with freeze-dried grass carp vaccine before stocking or when passing through the pond. In the onset season, disinfect with chlorine dioxide, dibromohysterine, bromochlorohysterine or strong chlorine once every half month. At the onset of the disease, the whole pool is sprinkled with rhubarb, with 2 kg per mu per meter of water depth (rhubarb is first decocted with an appropriate amount of water for 15 minutes).

Every 100 kilograms of fish are fed with kilograms of rhubarb, skullcap, cork, banyan root and other Chinese herbs (alone or in combination), and kilograms of salt mixed and mixed feeding for 7 days. You can take a look at the thriving fish medicine.

The test paper is sold in the aquarium store and is very cheap!

Changing the water or diluting or neutralizing it, in fact, it is safer to change the water.

There are fish in the fish pond, which cannot be disinfected with quicklime. Quicklime dissolves in water, will produce strong alkali and strong calcium oxide, and will release a lot of heat, so fish will inevitably die in large numbers.

The main component of quicklime is calcium oxide, which is usually made by calcining the natural rock whose main component is calcium carbonate at high temperature, which can be decomposed to produce carbon dioxide and calcium oxide (chemical formula: CAO, that is, quicklime, also known as marble). Reaction equation for quicklime dissolved in water:

cao+h2o=ca(oh)2。

No, if you want to be lime, you must have turned your stomach, you must not be!

Yes, but in small amounts many times to prevent stress.

The main reason for the fish turning over the pond is caused by the lack of oxygen, and the main reasons for the lack of oxygen are as follows:

1. The density of fish is too large. When the fish forage and move more, they consume a lot of oxygen, resulting in a lack of oxygen in the water.

2. The water in the fish pond is too fertile. The more fertile the water, the more microorganisms there are, and the large number of microorganisms that multiply and survive will consume the precious oxygen in the water, which is also the reason for the red tide that often occurs in the sea.

3. The air pressure is too low. Usually foggy days and thunderstorms are preceded by low atmospheric pressure, and when the atmospheric pressure is low, the oxygen in the water will overflow the water, resulting in a lack of oxygen in the water.

4. The temperature is too high. Usually the high temperature is followed by a thunderstorm in the morning, and the next day it is sure to turn over the pond (in the absence of measures). Because the higher the temperature, the lower the saturation of the gas in the water, and when combined with the low air pressure before the thunderstorm, the oxygen content in the water will definitely decrease.

It is easy to turn over the pond when there are many shallow fish, and it is easy to turn over the pond when there are many carp and carp.

This can happen when the air pressure drops, such as on cloudy days, when there is a lack of oxygen in the water; Or in the water, for example, if there are too many organisms in the water, the oxygen content will decrease, and the pond will also be turned over;

Then there is the excessive use of drugs or the water in the pond is polluted;

Generally caused by hypoxia as the main factor, followed by the accumulation of metabolites, when it comes to low or hypoxic reasons, if a pond contains oxygen = high, it is easy to decompose metabolites and excess organic matter, as well as ammonia, etc., summer is a critical moment for fishery production, this time must be noted, followed by ammonia and sulfide can cause fish poisoning, high concentration can cause fish death, but these harmful gases decrease with the increase of pH, Therefore, in the summer, the pond needs a suitable alkaline environment, and at the same time, care should not let the water quality be over-fertilized, and the branches in it can be fished out immediately.

Generally, it is in the case of hypoxia, and it is not a rainy day.

When the fish pond has too much feed or polluted water quality (such as pig manure water, rotten grass and other rotten substances) into the fish pond in large quantities, siltation is formed at the bottom of the fish pond, and when the weather is too hot, fermentation produces a large amount of biogas, resulting in insufficient oxygen in the fish pond water, so that the fish float up to absorb oxygen, some fish faint due to lack of oxygen, and the phenomenon of tummy occurs, the phenomenon of turning over the pond occurs in the general fish pond, which will cause a large number of fish to die, causing heavy losses, To solve the phenomenon of turning over the pond caused by this reason, it is necessary to pay attention not to make a large amount of rotten material in the fish pond, and to fish and clean it frequently, and at the same time regularly start the air pump to keep a certain oxygen content in the pond.

It is also possible that toxic substances, such as pesticides, enter the fish pond and cause the pond to turn over. In this case, it is less likely to recover losses.

In addition, it may also be a sudden change in the weather, for example, the weather is sunny and suddenly there are continuous rainy days, resulting in oxygen debt in the upper and lower waters, and it will also be fish turning over the pond, the solution is to actively pay attention to weather changes and turn on the aerator at the right time to avoid the generation of oxygen debt.

Contaminated or the density of the fish is too high.

Geomembrane is an environmentally friendly geotechnical material, which is processed from brand new plastic particles and has no effect on fish or water quality. Hope it helps, thanks!

It has no effect on water and fish, and the geomembrane has the characteristics of environmental protection, non-toxic, easy to clean, and improve the accuracy of fertilization and application.

1. Water storage HDPE geomembrane has good water storage performance due to its extremely low permeability coefficient, which prevents the water in the fish pond from seeping into the soil, effectively monitors the water level, and saves the related water retention costs. It also prevents the toxic substances from the ground from being filtered into the fish pond, reducing the pollution of the water source, and of course, the fish will become healthy when they drink healthy water!

2.Water quality stability The use of HDPE geomembrane can better maintain the balance of water quality, reduce the change of water conditions, and reduce the cost and time of water quality control.

3.Oxygen content The use of HDPE geomembranes can reduce the loss of oxygen caused by infiltration into the soil, facilitate the monitoring of oxygen content in the water, and reduce the cost of supplemental oxygen in fish ponds.

4.Reduced maintenance costs The use of HDPE geomembrane can inhibit the growth of algae in the water and is easy to clean. Since the geomembrane itself contains anti-ultraviolet additives, the geomembrane is not afraid of the sun and is easy to maintain.

The use of geomembranes can provide easier monitoring and a safer environment. Since the cost and time of maintenance are very low, fishing can be carried out more easily and quickly.

5.System Stability Compared to digging ponds directly, the use of HDPE geomembranes can make the slope more stable. It is beneficial to eliminate the threat of natural conditions such as wind, rain and waves to the fish pond, maintain the stability of the system during the design, and prevent the loss of the breeding crops in the fish pond due to environmental damage.

In addition, the use of HDPE geomembrane can make the pond have a steeper slope and a deeper depth, which is equivalent to a disguised increase in production. The stability of the system also reduces the maintenance and earthwork costs of the fish ponds.

6.Increasing production Because HDPE geomembranes are used, there are no weeds, sludge, and other things that affect the salvage speed at the bottom of the pond, so fishing can be carried out more efficiently. The fishing time will be greatly reduced, and the vitality and freshness of the fish and shrimp will be greatly enhanced.

7.Disease hazards After the use of HDPE geomembrane, the environmental adaptability of bacteria in the fish pond will be greatly reduced, so as to maintain the healthy growth of fish and shrimp. Because the soil and water are cut off, the chemicals in the soil and germs do not spread to the pond, reducing the possibility of disease transmission.

It can be said that the use of HDPE geomembranes reduces the cost of drugs for fish farming, as well as the risk of large-scale fish and shrimp mortality due to diseases.

8.Pond cleaning After installing HDPE geomembrane, it will be easier for the cleaning of the pond. And it is easier to install a clean drainage system inside the pond.

9.Improve the breeding cycle Due to the use of HDPE geomembrane, it is easier to clean and fish, saving a lot of cost and time, which can speed up the breeding of fish ponds and increase the output in disguise.