CATDOLL : CATDOLL: How to rescue prawns that have floated to the surface? What does fish floating to the surface mean?

1. How to rescue prawns that float to the surface?

Once the shrimp floats, rescue immediately:

A. Start the aerator immediately;

B. Replace one quarter of the water in the shrimp pond with new water;

C. Add oxygenators to shrimp ponds;

D. Stop feeding during the period of floating head. Even after returning to normal, the feeding amount should be reduced. For water management after floating head, you need to first confirm what causes the floating head, because there are many reasons for floating head, which cannot be repeated here one by one, but the stability of the five basic indicators of pH value, ammonia nitrogen, nitrite, hydrogen sulfide and dissolved oxygen is the only prerequisite. Regardless of the normal shrimp farming process or after the shrimp floats, these five elements must be adjusted and balanced, so that the floating head phenomenon should not occur.

2.What does fish floating head mean?

The floating head of fish can be summarized as exogenous and endogenous. The endogenous ones include blood-borne and gill-borne.

Exogenous floating head

Exogenous floating is the lack of oxygen in the water. Generally, tropical fish, goldfish, and koi require 5 mg/L of dissolved oxygen. Some high-oxygen fish require 7 mg/L. Under normal circumstances, fish will float when the dissolved oxygen in the water is lower than 1 mg/L, and will suffocate and die when it is lower than 0.5 mg/L. High-oxygen fish will die before 0.5 mg. If the dissolved oxygen is lower than 5 mg for a long time, even if the fish does not die, it will grow slowly and its color will become lighter. However, home oxygen fish are usually equipped with oxygenating equipment, and generally will not be lack of oxygen for this reason. It is only when the water quality deteriorates, the weather is hot and muggy, and the weather is low in pressure that special attention should be paid.

Endogenous floating head

Hematogenous floating head, caused by poisoning

3. What exactly is the small floating head of the floating head heat exchanger?

Floating head heat exchanger: BES or AES. It consists of: tube box, tube sheet, cylinder flange, shell, tube bundle, etc. The tube box consists of sealing plate, tube box flange, connecting pipe, connecting pipe flange, etc. The tube bundle consists of heat exchange tube, baffle, tie rod, distance tube, tube sheet, etc. For details, please refer to GB151 or JBT 4714 and other standards

4. What is the authentic way to cook floating crucian carp?

Main ingredients: 7 small crucian carps, 1 bottle of beer, corn starch, 1 spoon of braised soy sauce, 1 spoon of sugar, 1 spoon of cooking wine, 1 spoon of rice vinegar, 1 spoon of red bean paste, 2 stalks of coriander, 1 spoon of salt, pepper, onion, ginger, cooking oil

【Specific steps】

1. Scrape the scales and remove the gills of the small crucian carp and keep it clean. However, after arriving in Xuzhou, I found that the small crucian carp sold here are not scaled. This depends on the habits of different places.

2. Use a knife to make a few cuts on the fish to make it easier to season. Add a spoonful of cooking wine, some shredded green onion and ginger, and a spoonful of salt and marinate for half an hour.

3. Wipe off the moisture on the surface of the marinated crucian carp, coat it with a thin layer of corn starch, and fry it in a frying pan over medium heat. Don't flip it over in a hurry. Wait until the bottom becomes golden brown and hard and you can flip it over easily.

4. Fry the small crucian carp until golden and crispy, and try to fry until the fish bones are crispy. After frying, take out and control the oil. In fact, the fried small crucian carp is super delicious if you sprinkle some seasoning powder on it and mix it.

5. Leave a little oil in the pot, add peppercorns, shredded green onions, shredded ginger, and a spoonful of red bean paste and stir-fry over low heat until fragrant. If you can eat spicy food, you can also add some dried red peppers.

6. Pour in the small crucian carp, a bottle of beer, add a spoonful of braised soy sauce, a spoonful of sugar, and a spoonful of rice vinegar, bring to a boil over high heat and then simmer over low heat for 20 minutes.

7. Sprinkle some coriander on the stewed crucian carp and serve.

5. Why do shrimps float to the surface in the morning?

The crayfish float to the surface due to lack of oxygen. As the temperature rises, the air becomes hot and humid, and the air pressure decreases, the dissolved oxygen in the crayfish pond escapes, causing the water to lack oxygen, causing the crayfish to float to the surface.

Or if too much bait is fed in the evening of the previous day, the crayfish will be active all night long due to foraging, and their activity level will increase, consuming a large amount of dissolved oxygen.

The water body was originally lacking in dissolved oxygen, causing serious hypoxia in the shrimp pond and the phenomenon of floating heads crawling on the edge.

6. How to catch fish that float to the surface due to lack of oxygen?

Generally, you can't fish at the bottom at this time. It's best to change bottom fishing to floating fishing, especially for fish with poor oxygen tolerance such as crucian carp, silver carp and bighead carp. Generally, these fish will absorb oxygen on the water surface, so the bait should be adjusted to the water layer where the fish is.

Another way is to fish in running water. Generally, there will be running water inlets in reservoirs. When fishing in rivers, you need to find the confluence of the river, as well as pond flood discharge channels, etc. Don't fish in still water where there is running water.

Another method is to fish in the leeward position, because when the wind is light at the upwind position, the wind at the leeward position is relatively strong, and the convection between the upper and lower layers of water will produce oxygen. There are also many floating objects at the leeward position, and places with much aquatic plants are also good fishing spots.

7. How to make fried floating fruit in Hutou?

Ingredients: 300g flour, 1 egg

Auxiliary materials: 4 grams of yeast, 20 grams of sugar,

Production method: (The details that need to be paid attention to during the production process have been summarized at the end, don’t miss it)

[Step 1]: First, prepare 120 ml of warm water, which should be slightly hot to the touch. Add 4 grams of yeast powder and 20 grams of sugar. If you like sweet food, you can add more. Stir until the sugar and yeast are completely dissolved and set aside. Next, pour 300 grams of ordinary flour into a large bowl, then beat an egg at room temperature, and then slowly pour in the stirred yeast water and knead the dough. It is easier to control the amount of water while stirring, and the dough will not stick to your hands. After stirring into flocs, add 10 ml of cooking oil.

Knead the dough into a smooth dough. You can knead it for a few more minutes until the surface is smooth and feels medium hard. Place it in a warm place to rise until it doubles in size.

[Step 2]: After tearing the fermented dough apart with your hands, you can see rich honeycomb inside. Then put it on the panel and knead it to exhaust the air. Shape it into a round dough, flatten it with the palm of your hand and roll it into a thin round dough with a thickness of about 2-3 mm. After rolling the dough thin, cut it into long strips two fingers wide, and then cut it into small diamond-shaped cubes with a slanting knife. After all the cuttings are done, sprinkle some dry flour on the surface and spread it evenly for later use.

[Step 3]: Next, stack two diamond-shaped pieces together, cut a cut in the middle, and then pass through the middle in the opposite direction. Twist the other corner in the opposite direction, and our green piece is ready.

Of course, when we cut the dough into small pieces, we can cut it into diamond-shaped pieces or rectangular pieces, which can be big or small. The prepared raw dough does not need to be rested.

[Step 4]: Pour more cooking oil into the wok, and fry the dough when the oil temperature reaches 40% hot. Turn it over after the dough floats up. Do not use too high a heat during frying, just use medium or low heat.

Keep frying until they turn golden brown, then drain the oil and remove from the dough. Of course, we can also add some sesame seeds when kneading the dough, which will make it taste better.

After frying everything, you can also boil some syrup and pour it on the surface, which will make the sweet and crispy taste even better. The fried fruits made in this way will be golden in color, beautiful and delicious, and perfect for entertaining guests.

8. How to solve the problem of shrimp floating?

No matter what the reason for the shrimp floating, once the shrimp floats, artificial oxygenation must be carried out first, such as turning on the oxygenator to increase oxygen, adding new water, using oxygenators to increase oxygen, etc. There is only one purpose, which is to ensure the safety of the shrimp by increasing the dissolved oxygen in the water body, and the sooner the better.

Changing the water: This is very necessary. Generally, shrimps will secrete a lot of secretions in the water after they float. At this time, the water quality will further deteriorate. Therefore, when shrimps float, the water should be changed in time. This can drain away some of the harmful substances in the water. At the same time, adding water can increase the dissolved oxygen in the water. In addition, adding water can also dilute the concentration of some harmful substances in the water, so as to stabilize the water.

Improving the bottom layer: The above two methods are only temporary solutions. If the floating head is caused by water quality problems, it is best to wait until the shrimp's condition stabilizes and choose sunny weather to use medicine to improve the bottom layer. Only by improving the ecosystem at the bottom of the pond can you fundamentally prevent the shrimp from floating due to lack of air.

Reasonable feeding: Generally, we should stop feeding for one to two days after the shrimps float. More importantly, we must feed reasonably according to the shrimps’ condition and changes in the weather, water quality and other environments during normal feeding. In some abnormal weather conditions, we must feed less or not feed to prevent the shrimps from floating.

9. How to solve the problem of shrimp floating on the surface?

Emergency measures when floating heads appear: a. Start the aerator at full capacity and replace the water in time if conditions permit; b. Reduce the feed in time or stop feeding for 1-2 days; c. First sprinkle Fish and Shrimp No. 2 (1L/mu) in the whole pond to detoxify the water, and then sprinkle Fish and Shrimp No. 1 (2Kg/mu) for emergency treatment. This can be repeated in case of emergency.

The following details should be taken into consideration in daily dissolved oxygen management:

1. Carefully inspect the pond and pay attention to the changes in the details of the pond. The following situations will cause the shrimp to float in the evening or the next morning: the shrimps are scattered and swimming in the upper layer of the water, and they do not come down for a long time, especially after dark; the water in the pond is too concentrated, the transparency is low, or the water suddenly becomes clear; the water temperature is too high, there is a bad smell overflowing, and a large amount of blue indigo floats on the surface of the pond; the weather is hot and humid, and snails and small fish appear in large numbers around the pond; the shrimps suddenly eat less, and the remaining feed in the observation net increases significantly or does not move. Any of the above details can be regarded as a sign of possible hypoxia in the pond and should be given full attention.

2. Do a good job in preventing hypoxia on a daily basis: a. Learn to pay attention to details at the pond head when patrolling the pond; b. Strengthen water quality management on a daily basis, regularly use microorganisms to improve the bottom and adjust the water to maintain water stability; c. Rationally choose high-quality feed and adjust the feeding amount to reduce the consumption of dissolved oxygen by accumulated waste in the pond; d. Strengthening monitoring is the most conservative method, use a dissolved oxygen meter to monitor continuously, and the daily minimum dissolved oxygen should not be lower than 4 mg/L.

10. What are the diagnosis and treatment methods for floating fetal head?

The diagnosis and treatment of the high floating fetal head can be done through B-ultrasound examination combined with the four-step palpation method, which can help to make a clear diagnosis. Generally, the high floating fetal head indicates that the fetus has not yet entered the pelvis. Most of the time, when doing the four-step palpation method, the fetal head can move and is not fixed, which can usually help with the diagnosis. At this stage, it is necessary to combine the pelvic measurement to determine whether there is cephalopelvic disproportion.