What are the reasons for excessive ammonia content in the water and how to prevent ammonia poisoning

Oxygen should be pumped in time, and the water should be changed every once in a while, only in this way can the ammonia content be avoided. In addition, there are too many pollutants under the bottom of the fish pond and it is easy to cause this situation, so it is necessary to clear the pond in time.

There are often some microorganisms in the water, so it is likely to make ammonia gas as a preventive method, which is to change the water of the fish frequently to keep the water clean.

It is very likely that there is not enough oxygen in the water, or there are too few phytoplankton, or it may be that fish feces are affecting the water quality. Be sure to disinfect regularly, change the water regularly, and also pay attention to the density of the fish.

<>1. Stop feeding: Regardless of whether the water chain judges whether the animal is eating or not, it is necessary to stop feeding with dates immediately to reduce nitrogen production. 2. Start the aerator machine

Turn on the aerator and stir the water to allow the molecular ammonia to volatilize into the air. 3. Use sodium thiosulfate: sprinkle the whole pool after using sodium thiosulfate to transform the water, the dosage is 2-3 kg mu, and the dosage can be increased if necessary.

4. Use of biological agents: use photosynthetic bacteria, such as yeast, which can directly or indirectly utilize molecular ammonia.

1. How to deal with the high ammonia nitrogen in the aquaculture water

1. Stop feeding.

1) If it is detected earlier, aquatic animals may still be ingesting at this time, but there are no symptoms of poisoning.

2) Regardless of whether aquatic animals are feeding or not, stop feeding immediately to reduce nitrogen production.

2. Start the aerator machine

1) Set up an aerator to stir the water to volatilize the ammonia in its molecular state into the air.

2) The setting of an aerator can also allow the bottom water to interact with the surface water, which can reduce the content of ammonia molecules in the bottom water.

3. Use sodium thiosulfate.

2-3 kg of sodium thiosulfate per mu of pond (call for demolition water sprinkling), if the ammonia nitrogen content still does not drop to the ideal state, the dosage can be increased appropriately.

4. Use of biological agents.

1) Using photosynthetic bacteria, such as yeast, yeast can directly or indirectly utilize molecular ammonia.

2) It should be noted that Bacillus subtilis should not be used because it can speed up the decomposition of organic matter in the pond, and when organic matter is decomposed, ammonia molecules will be produced, which will further increase the concentration of ammonia nitrogen, causing serious consequences.

2. What is the cause of high ammonia nitrogen in aquaculture water?

1. In the process of aquaculture, the decomposition of bait, plankton residues and aquatic animal excrement in the pond will produce nitrogen-containing intermediate products, and most of these products exist in the form of ammonia.

2. If it is a farmed shrimp, the nitrogen element will be directly discharged into the water in the form of ammonia through the gills when the substance is metabolized in the body, thereby increasing the ammonia nitrogen content in the pond.

3. When there is a lack of oxygen in the water, nitrate, nitrite and nitrogen-containing organic matter will be denitrified under the action of anaerobic bacteria, and then ammonia will be produced.

4. When there is a lack of oxygen in the water, ammonia cannot be converted to nitrite under the action of nitrosifying bacteria, but is converted to nitrate, and then directly utilized by plants.

a) Stop feeding bait immediately, if it is found that the ammonia nitrogen rises earlier, there may not be symptoms of poisoning at this time, the shrimp is still feeding, regardless of whether the shrimp is feeding or not, the first step is to stop feeding the bait immediately and reduce the nitrogen delivery.

b) Start the aerator to stir the water body and carry out sufficient aeration to promote the volatilization of ammonia in the molecular state into the air. The bottom water with high molecular ammonia content is mixed with the surface water with low content to reduce the content of ammonia molecules in the bottom water.

c) The use of sodium thiosulfate (commonly known as Haibo) in the pool, after dissolving in water, splash the whole pool, use 2 3 kg of this product per mu, if the ammonia nitrogen content is still not reduced to the ideal state, the amount can be increased as appropriate; This product** is low, the cost of mass use does not increase much, and it will not cause harmful residues in the water body to reduce the level of ammonia nitrogen in the water.

d) The use of biological agents, biological agents can only choose to use photosynthetic bacteria, yeast and other bacteria that can directly or indirectly use molecular ammonia, at this time do not use Bacillus subtilis, Bacillus subtilis will promote the decomposition of organic matter in the pond, the intermediate metabolites are mainly ammonia molecules, Bacillus subtilis promotes the superposition of ammonia molecules released from organic matter and the original ammonia molecules, which will further increase the concentration of ammonia nitrogen, causing serious consequences.

e) Use drugs to reduce the pH value of the water body, because the pH value significantly affects the concentration of molecular ammonia, and after the ammonia concentration exceeds the standard, the alkali-lowering drugs are used to splash the whole pool to reduce the proportion of ammonia nitrogen, thereby reducing the toxicity.

f) the use of glucose, calcium chloride or salt poured throughout the pool, these three substances can not eliminate or convert ammonia nitrogen, but can reduce the toxicity of ammonia nitrogen, and reduce the effect of pH value, after reducing the toxicity of ammonia nitrogen, stop feeding, with the improvement of dissolved oxygen microecological agents of the combined effect, in 2 3 days the total amount of ammonia nitrogen can be reduced.

Why is ammonia nitrogen accumulation high in California perch ponds?

1. At present, many areas of California perch are fed with the mode of feeding chilled fish, which is a high-protein bait, and the nitrogen-containing substances generated after protein decomposition are discharged and remain in the water body, and excessive ammonia accumulates in the pool, resulting in ammonia nitrogen poisoning.

2. The California perch has a large intake, a large amount of feeding, and a low utilization rate of bait, resulting in too much residual bait feces, which will cause pollution to the water body, and will cause the consequences of excessive ammonia nitrogen for a long time.

How does ammonia nitrogen in water cause fish poisoning?

Ammonia nitrogen (NH3-N) in water exists in two forms: non-ionic ammonia (NH3 toxic) or ammonium salt (NH4+ non-toxic), and is continuously converted into each other to achieve dynamic equilibrium. Non-ionic ammonia is the main substance that harms aquatic animals.

The toxicity of ammonia nitrogen in aquaculture water has a great relationship with pH value and temperature. When the pH value is higher and the water temperature is higher, the proportion of NH3 formation is also larger, and the toxicity is also enhanced. When the pH value is lower and the temperature is lower, the proportion of NH3 formation is also smaller, and the toxicity is reduced. This is also the main reason why ammonia nitrogen poisoning in sea bass ponds often occurs when the water and fertilizer and the light are too strong, and the temperature rises.

How to prevent ammonia nitrogen deposition in aquaculture water?

1. Clear pond dredging.

Conditional pond dredging once a year can reduce the residual bait feces of the previous year, and can also reduce a variety of harmful substances such as parasites, bacteria, and viruses.

2. Regular use of microecological preparations.

It can deplete organic matter in water bodies, improve water quality, and provide nutrients for algae.

3. Strengthen feeding management.

Choose high-quality bait to avoid rotting and deterioration affecting palatability and resulting in a surplus of California bass bait.

Before feeding, you can use Ulanbao-Yucca extract, its unique ingredient yucca saponin can change the permeability of the intestinal wall, increase the length and thickness of intestinal villi, have a stronger absorption capacity of nutrients, and promote the utilization rate of high-protein bait by fish, thereby reducing the increase in ammonia nitrogen content emitted by residual bait and feces, and fundamentally reducing the accumulation of ammonia nitrogen in the water body.

It is not alarmist that the ammonia nitrogen in the water body of fish breeding exceeds the standard and causes the violent death of the whole pond, and the accumulation of ammonia nitrogen in the water body directly or indirectly damages the health of the fish, so the farmers can have the last laugh by paying attention to the harm of ammonia nitrogen in the water body and preventing and controlling it in time!

Answer 1: Open more aerators to promote the flow of pool water up and down, increase the dissolved oxygen at the bottom of the pond, and promote the release of ammonia nitrogen and other toxic gases from the water body. 2. Maintain an appropriate stocking density and a reasonable matching pattern, make reasonable use of water space, and avoid blindly pursuing unreasonable high density and high yield. Causes of excessive ammonia nitrogen:

Ammonia nitrogen is produced by improper disposal of farmed fish feces and other excreta, plankton debris, sludge, etc.

One is to increase aeration, and now there are special strains for denitrification, which are specially used in fish ponds.

The main slurs of ammonia nitrogen are feed, fish excrement, fertilizers and the remains of dead animals and plants that sink to the bottom of the pond. About 80 to 90 percent of the nitrogenous excreta of fish are ammonia. Fish poisoning occurs when the accumulation of ammonia nitrogen reaches a certain concentration in the water.

If it is found that the ammonia nitrogen in the pond water exceeds the standard, formaldehyde, aerators, hydrogen peroxide or calcium peroxide, as well as sodium hypochlorite, zeolite powder or activated carbon can be mixed with the pond edge soil and then put in.

Ammonia nitrogen exceedance usually occurs in the middle and late stages of aquaculture, when due to the increase of residues and manure, harmful substances at the bottom of the pond continue to be deposited, resulting in ammonia nitrogen, nitrite and other exceedance.

Usually, first try the detoxification and water king or detoxification water king to decompose the macromolecular organic matter in the sediment body, and then try the bottom modification products such as clean bottom to decompose the harmful substances deposited at the bottom of the pond. After the water quality has been adjusted, it is necessary to regularly use chlorella source, Bacillus subtilis, etc. to fertilize the water to stabilize the water quality.

If these steps are taken well, the water quality of the pond will not deteriorate.

The four major fish in China are herring, grass carp, silver carp and bighead carp. Generally, there are many reasons for low dissolved oxygen and high ammonia nitrogen in fish ponds, such as fertilization methods, bait delivery, timely water injection, stocking density, etc. Here's how to deal with it:

When the water temperature reaches 6 8, silver carp and bighead carp broodstock ponds should be fertilized to promote the reproduction and growth of bait organisms, and top dressing should be carried out in a timely manner according to the water color. After the water temperature reaches 12 to 15, it is necessary to insist"Three looks"Fertilization, ie"Look at the water, the weather, and the activity of the fish"Fertilization, insist on small amounts, multiple fertilizations. The transparency of the pool water should be maintained at 25-30 cm.

Silver carp and bighead carp are mainly fed with fertile water, and each broodstock is fed about 20 grams of concentrate feed every day, such as bran, cornmeal, and soybean cake flour account for one-third each. In the early stage of breeding, grass carp broodstock are fed with 1 cm long malt, each tail is calculated by 25 grams of dry weight per day, and at the same time feed vegetable leaves and aquatic plants, and in the later stage, the grass is mainly fed, and the amount of food is eaten in 3 or 4 hours.

Timely water injection: Ensuring good water quality is key to breeding broodstock. More flushing and frequent flushing can regulate the water quality of the pond, improve the pool water environment, and promote the early maturity of the gonads of broodstock.

Starting from the water temperature 10, insist on flushing water once a day, increasing the water level by 3 5 cm each time, and flushing the silver carp and bighead broodstock pond once a week; Half a month before giving birth, grass carp should be flushed once a day, each flushing for 2 hours, silver carp, bighead carp pond flushing once every 2 3 days, after reaching the highest water level, to pump new water.

Adjusting stocking density and species matching is the primary condition for breeding good broodstock, and the pond area of broodstock ponds should be 2000 to 2600 square meters. Before dividing the pond, the pond water was drained to remove wild trash fish, snails and predators, and part of the sludge was removed at the same time, and 100 150 kg of quicklime per mu was sprinkled for disinfection. After 5 days of water injection, the water depth is 1 meter, silver carp and bighead carp are applied 200 300 kg of fermented pig manure per mu as base fertilizer, and the stocking density is 150 200 kg per mu.

Broodstock ponds should not be used to raise breeding fish and commercial fish. If the pond has been divided according to the appropriate density in the autumn of the previous year, it can no longer be divided in the spring. Such a fish pond can pump out the pond water 1 3, keep the water depth at meters, and dry the water for about 10 days, which can increase the temperature of the pond water and promote the broodstock to start eating early.

It can reasonably solve the problem of low dissolved oxygen and high ammonia nitrogen in fish ponds.

Reasons: 1. The breeding density is large, 2. The pond has more waste, and the silt is thick, 3. There are fewer beneficial algae in the pond water, and the water is thin 4. There are fewer beneficial microorganisms at the bottom of the pond 5. 6. Insufficient aeration equipment.

7. Dirt and snow cover in winter. Ice takes the following measures depending on your specific situation.

Correspondence processing method. 1. Reasonable breeding density 2. Dredging 3. Introduce good water and fertilize appropriately 4. Supplement microecological preparations 5. Change part of the water and re-cultivate water 6. Increase aeration machinery 7. Sweep snow, flush water, and hit ice eyes.

There are three main problems.

1.Water changes are not frequent. (Change the water by more than 20% every 10 days).

2.Excessive microbial deposition at the bottom of the pond. (It can increase the particle oxygen, increase the microbial oxidation at the bottom of the pond, and increase the proportion of silver carp and bighead carp).

3.The power of the oxygen supply equipment is insufficient. (Replace high-powered oxygen supply equipment).

Aquaculture winter needs to pay attention, strict prevention of poisoning incidents, poisoning is divided into harmful gases and pool sugar water body, for different poisoning symptoms to take different preventive measures, many aquaculture farmers have mentioned this problem, to give you a detailed explanation of the key points of winter breeding prevention poisoning, I hope to help you.

Hydrogen sulfide in the aquaculture pond is highly toxic and highly lethal to fish, and its concentration should be strictly controlled below under normal circumstances. When the concentration of hydrogen sulfide in the aquaculture pond increases, its growth rate, physical strength and disease resistance will be weakened, and the central nervous system of fish and shrimp will be damaged in severe cases. Hydrogen sulfide combines with iron ions in the blood of aquatic animals to reduce hemoglobin, reduce blood oxygen-carrying capacity, and cause difficulty in breathing in fish and shrimp.

Symptoms of chronic ammonia nitrogen poisoning in fish, fish food intake decreases, the time is short, or the fish disperses after a while when ingesting, and floats around to drink foam. In rainy days, pelagic fish, such as silver carp, float on the surface of the water for a long time, and the feeding of benthic fish, such as carp, gradually decreases. The decrease in dissolved oxygen, eutrophication, and the increase in pH value and temperature will all cause an increase in ammonia nitrogen and aggravate the toxicity of the water body to fish.

For example, the nitrogen content in the water body is very high due to the intensive pond that uses a large amount of high-protein feed, and the ammonia nitrogen concentration in the water body will suddenly increase due to the large-scale death of phytoplankton caused by environmental factors.

The most important thing is that the free nitrogen and ionized ammonium in the aquaculture water body are collectively called ammonia nitrogen, which is mainly feed, fertilizer, aquatic excretion and other water bodies injected. Ammonia nitrogen has obvious poisoning and lethal hazards to farmed fish. Most of our farmed fish are very sensitive to ammonia nitrogen, and when the bottom line of harm is reached, the growth of grass carp will be inhibited.

Improve water quality, increase bottom dissolved oxygen, and rationally use aeratorsStrengthen the upper and lower convection, frequent dredging, water change, reduce the amount of plankton and organic matter in the water body to increase the dissolved oxygen in the water body, use chemical aerators, and use calcium peroxide and ammonium persulfate that decompose slowly in the water in intensive ponds, which have a better effect on improving water quality, especially the bottom water quality. Dissolved oxygen in the water body, especially the sufficient dissolved oxygen at the bottom of the pond, can eliminate the toxic ammonia nitrogen in the water body and keep the pH value of the water quality stable. Reasonable fertilization, intensive pond should be less slow effect, large oxygen consumption of organic fertilizer, high temperature season to apply more phosphorus fertilizer.