It is better to add well water to the shrimp pond during the day and at night. When should the shrimp pond be added with well water?

If it does not rain for a long time, the water quality of the shrimp pond will deteriorate and water needs to be changed urgently. If the temperature of the external water rises, the moss will rot, stink and turn black, and the algae toxins are very high, the well water solution can be used to detoxify and cultivate bacteria and algae in time. Of course, there are many special situations. Let's take a look at when to add well water to the shrimp pond.

When is the best time to add well water to the shrimp pond?

1. When there is a drought and water is needed urgently, but there is no other water source, you can use well water for emergency. This situation is rare, but it is only recommended to use it in special circumstances.

2. If you encounter special circumstances, such as the drinking water is poisonous and you temporarily have no other emergency water source, you can also use well water as an emergency water source. This is a measure only taken when there is no other way.

3. When the weather is hot, you can use well water to lower the water level in the shrimp pond. Note that the water used for cooling should not be too much. It is enough to lower the water temperature to about 26~30 degrees. If the water temperature is too low, you can choose to dry it at room temperature to prevent the crayfish from experiencing strong stress due to the low water temperature.

Well water is not an ideal water source for shrimp farming because of its low water temperature, the fact that some well water contains rich minerals and is very clean, which can easily lead to thin water quality. When there are other alternative water sources, we should try not to use it.

In short, when to draw well water to irrigate the shrimp pond should be based on the actual situation of the shrimp pond. It does not mean that it is good and safe to use well water at any time. It is best to use it in an emergency.

Disadvantages of Well Water Farming

Well water is not suitable for aquaculture in theory, as it contains high levels of heavy metals and other minerals, is relatively hard, and has a large temperature difference between well water and surface water, which makes it unsuitable for shrimp and crab farming. If farmers do not have the conditions, well water can be used as an option. However, the yield and the difficulty of disease prevention when using well water for aquaculture are quite different from those of conventional river water aquaculture.

If you use well water temporarily, it is OK to use fruit acid (Yangsheng Detoxification) or sodium thiosulfate to remove heavy metals in time, and then expose it to the sun for about 5 days before cultivating algae and bacteria. If you use well water for aquaculture for a long time, it is recommended to use a differentiation pool to pump the well water out of the ground and store it for a period of time before using it, use the sun to disinfect and expose it, reduce the mineral content and water hardness, increase the well water temperature, and naturally cultivate plankton before using it. This process takes about 10 days to naturally improve the well water to river water quality.

How many acres of crayfish farming are needed to earn 200,000 to 300,000 yuan a

There is no standard answer to this question. It is related to the geographical environment of the farm, the breeding technology, model and capital investment of the breeder.

I have seen people earning 200,000 to 300,000 yuan a year from 200 acres of land, 200,000 to 300,000 yuan a year from 100 acres of land, and I have also seen people earning that much from only 30 to 50 acres of land!

Therefore, we need to calculate how many acres of fish we need to farm to earn 200,000 to 300,000 yuan a year based on the average per-acre profit of local farmers. We need to take our own funds, technology, farming model, labor, and cycle into consideration. Only then can we draw a conservative conclusion.