Can copper sulfate be used during the molting period of shrimp and crabs?

This should be no, because there should be some other ingredients in something like copper sulfate, so this is harmful to health.

Hello, this one must not be used, because the use of copper sulfate on shrimp and crabs when molting is harmful to shrimp and crabs.

Of course, it is not possible to use copper sulfate for shrimp and crab poverty alleviation 17, because his ** is still very sensitive during this period, and the use of copper sulfate is not good for his body, so at this time we. No medication can be used.

Hello, it is best not to use copper sulfate at this time, because copper sulfate itself is rich in elements rich in heavy metals, and if you use this, it may lead to. The quality of the product is not very good.

Copper sulphate can be used to kill fungi. The dilute solution is used for sterilization in the aquarium as well as for the removal of snails. Since copper ions are toxic to aquatic organisms, the dosage must be strictly controlled. Most fungi can be killed with very low concentrations of copper sulfate, Escherichia coli.

During the next batch of trusts, this should also be able to use copper sulfate, which should allow him to molt for a better time, and the molting effect is also relatively good.

In general, they can't use copper sulfate, and things like this are best not to eat.

Do not use copper sulfate when shrimp and crabs molt, because this will cause their **sensitivity, which is not good for them.

Copper sulfate can be used when shrimp and crabs are peeled, but don't use it more than lovelorn.

It is best not to use this mineral, because the content of this mineral is relatively large, which can affect their development.

Hello friend shrimp crab peeling driver can use copper sulfate is some, shrimp skin is also helpful peeling period.

Copper sulfate can not be used when shedding and molting, because the sulfuric acid is in the object. Awesome, if we eat shrimp in the end, there will be a sulfuric acid plant flying first. Prawns are also a tank, so don't let it molt naturally with this stuff as well.

Copper sulfate can be used, and the use of copper sulfate during the period when the shrimp and crab are peeling will not have any effect on the shrimp and crab.

That's no, it's going to hurt them.

Of course, copper sulfate cannot be used when shelling and molting.

There is always a way to corrode their **.

I think it's best not to use this thing in the special because I think using it will have a bad effect on the quality of the shrimp.

Copper sulfate cannot be used for shrimp and crab peeling, because copper sulfate is a chemical substance that can cause damage to the human body after eating.

By the way, it should not be recommended for you to use it, and then it should not be allowed to use it.

No, you cannot. It's vulnerable.

Vulnerability.

No, not even a small amount, and generally this needs to be avoided during sensitive periods.

Hello friend, copper sulfate is generally not allowed to be used, this is not allowed.

It is best not to use copper sulfate when shrimp and crabs molt, because they are more fragile when molting.

Can copper sulfate be used during the molting period of shrimp head shrimp crab? Silly shrimp crab molting period should not be able to use copper sulfate fee to damage his trial of his **.

We can't use its copper sulfate in the current period of blind peeling, and I think this will still affect the quality of blind peeling, so we should still be able to take a look.

Can you use copper sulfate for this poverty alleviation deed, ** it should be the kind of removal of impurities, it should be possible.

Copper sulfate cannot be used during the peeling period of shrimp and crabs, and molting is a normal phenomenon for them.

The time for shrimp and crabs to peel off their skin and shell is not enough to use such a thing as copper sulfate.

Shrimp farming must pay attention to its shelling period, the molting of vannamei shrimp is basically the same as other shrimp, generally in the first half of the night. In the larval stage, when the water temperature is 28, molt once every 30-40 hours, and molt once every 4-6 days for 1-5g juvenile shrimp. The interval between the two molts of medium shrimp and adult shrimp of more than 15g is about 15-20 days.

In addition, low salinity and high water temperature can increase the frequency (frequency) of molting, which is conducive to shrimp growth. However, in some cases, it will be difficult for shrimp to molt, mainly for the following reasons:

1. The deterioration of water quality or substrate is manifested in the fact that the old shell only sheds half or even if the old shell is shed, the body shrinks.

2. Insufficient feeding, long-term hunger affects molting, insufficient nutrition, or poor feed is not easy to absorb.

3. Insufficient oxygen and difficulty in molting.

4. The stocking density is too large, densely crowded, and mutual interference will prolong the molting time, or the shell will not be able to shed and die.

5. The water temperature changes abruptly, low temperature hinders molting, and high temperature will also delay molting.

6. Drug effects: indiscriminate use of antibiotics or excessive use of drugs will affect molting or produce abnormal phenomena.

7. The light is too strong or the transparency of the water is too large, and the water is clear to the end, so that the shrimp swim in the pond indiscriminately, and the water will not molt or get sick all day long.

8. Some pests, such as ciliates, mineralize the carapace of shrimp, and the adhesion of the old and new shells makes it difficult for shrimp to molt.

9. Some bacterial diseases are caused, such as black spot disease, the principle of which is black spot disease.

10. Lack of trace elements and minerals in water. (Quite important).

In short, the ten major effects of shrimp shelling tell us that shrimp farming is not only dependent on weather, luck and technology, if we want to succeed in farming, we must accept new ideas, concepts and advanced equipment, aquaculture is the first to raise water, improve dissolved oxygen, improve substrate! For the bottom of the pond for bottom animals, the bottom quality must be good, in order to better breed fish and shrimp!

The main factors affecting the molting of crayfish are water temperature, nutrition, the developmental stage of the individual, and the stress response caused by environmental conditions. The water temperature is high, the food is abundant, and the development stage is early, and the molting interval is short. The molting of crayfish mostly occurs at night, and under artificial breeding conditions, it can sometimes be seen during the day, but it is relatively rare.

According to the activity and feeding of crayfish, the molting cycle can be divided into four stages: intermolting period, premolting period, molting stage and late molting stage. During the molting interphase, the crayfish feeds vigorously, and the carapace gradually hardens. In the early stage of molting, from the crayfish stops feeding to the beginning of molting, this stage is when the crayfish prepares for molting. When the crayfish stops feeding, the calcium in the carapace is transferred to the calcium stone in the body, the calcium stone in the body becomes larger, the carapace becomes thinner and softer, and separates from the endocortical layer; The molting period is from the crayfish to the crayfish lying on its side to the complete molting of the carapace, which lasts from a few minutes to more than ten minutes, and most of the ones observed by the author are 5 lomin, and the crayfish are easy to die if the time is too long. The late stage of molting is from the molting of crayfish to the beginning of feeding, which is the process of evolution from the cortex layer of crayfish carapace to the carapace.

Water enters the human body from the cortex, the body gains weight and increases, and the calcium of calcium stone in the body is transferred to the cortical layer, and the cortical layer becomes hard and thickened, becoming a carapace, and the calcium stone in the body finally becomes very small.

When the shrimp molts, the new skin is completely grown, and when the pigment layer is formed, it is quite bendable. Shortly before shedding from the old skin, the water content in the body begins to increase, at which point the shrimp will perform various bending and sprinting movements. Finally, it chooses a hidden place, constantly bends its abdomen, and emerges through the diaphragm between its chest and abdomen.

During molting and its later stages, the animal's body expands rapidly. The distending of the stomach is an important feature, which allows the animal to expand the outer skin of the thorax before molting. Shrimp dilates the stomach by sucking in human gas and absorbs calcium from the outer skin during molting.

Just before the old skin is shed, the blood and tissues begin to take in a lot of water. Shrimp take in water mainly through the body surface, and one of the factors for water intake is the increase in blood osmotic pressure in the premolting stage. Water is sucked into the body through osmosis.

Rapid water uptake during molting dilutes the blood and lowers osmotic pressure. The concentration of ions in the blood during the premolting period was mainly increased, especially the increase in the percentage concentration of calcium and magnesium. After molting, the decrease in blood calcium in the animal occurs at the same time as the calcification of the new skin, and the amount of blood calcium is not enough to indicate the degree of calcification of the new skin, so calcium must also be ingested from the outside. In order to prevent the new skin from being distorted, the molted animal will reduce muscle activity as much as possible and is in a period of rest.

So the molting of many species of aquatic animals is carried out at night. First, it can reduce unnecessary activities; The second is a means for animals to avoid the weak when they are powerless. If exposed to continuous light, they will delay molting.

Due to the changeable weather in April, it is prone to sharp increases or large fluctuations in pH. On the one hand, if the pH is too high, most of the nutrients in the water body may be absorbed by aquatic plants or moss, and the algae are lacking, and there are few nutrients for the river crab to absorb and utilize. On the other hand, if the pH is too high, it will affect the food of the river crab to become worse, and in the first half of the night, on the grass, on the shore, there will be symptoms such as claws and ring claws, and symptoms such as top shell and leg pulling will appear during the shelling period, which will reduce the success rate of shelling of river crabs.

Second, the substrate deteriorates and the sub-salt exceeds the standard.

It may be due to the excessive use of fertilizer in the early stage, especially if a large amount of farmhouse fertilizer and compound fertilizer have been used in the Bantian, the rainwater may cause a large amount of fertilizer on the Bantian to be brought into the ring ditch by the rainwater, causing the nitrite to exceed the standard. If the nitrite is seriously exceeded, it is very easy to cause the phenomenon of hypoxia ashore, upper and upper grass in the second half of the night, and the river crab in the molting period will have the phenomenon of unsuccessful molting such as pulling feet due to high nitrite and lack of dissolved oxygen in the water body.

The deterioration of the substrate causes a large number of anaerobic bacteria at the bottom, and the heat at the bottom, which is easy to cause hypoxia at the bottom, and then causes the increase of reducing substances at the bottom, such as sub-salt and ammonia nitrogen. As a result, river crabs go ashore and grass in the first half of the night, which affects the feeding and nutrient accumulation of river crabs.

3. The climate is changeable.

In April, there are many rainy weather, and the temperature difference between day and night changes drastically, the temperature difference between morning and evening is generally 5-7, and the maximum temperature difference is even 14. Due to the unstable climate, the crab stress response is caused, resulting in a serious decline in the crab's physique, resulting in difficulty in shelling.

4. Nutrient deficiencies.

Due to the continuous rain and low temperature, the food condition of the river crab is poor, the nutrient accumulation of the river crab is relatively insufficient, and the physique of the river crab is often weak. And the interval between the first and second shells of the river crab is short, and a lot of energy is consumed in the process of molting the shell, and the physique of the river crab has not been recovered, and the second shell has already begun, so there will be a situation where the second shell has pulled the feet at the beginning.

5. Invasion of diseases and enemies: crabs with diseases and injuries are prone to failure to shed their shells.

Solution: 1. Pay attention to the time of crab shelling, and sprinkle calcium supplementation products on the day before the expected shelling.

2. Pay attention to the weather conditions during the shelling period, the temperature difference between morning and evening, the sudden change of weather, rain, heavy rain and other weather, which is a fatal injury to the crab.

3. Dissolved oxygen, the problem of oxygen tolerance at night, many people do not have a concept of dissolved oxygen, you can imagine how long you can live without oxygen, crabs are the most vulnerable when they are shelling, you must pay attention.

4. Aquatic weeds, aquatic weeds are the habitat of crabs, and they should be managed well. Hiding from predators.