Generally, when the fry are bought, they have to be transported to the fish pond. In this process, some problems may occur. For example, the transportation time is too long, the journey is bumpy, or the container for storage is not good. All these will cause the fry to have a stress reaction. It may be all right before it goes to the pond, and it will die soon after it is released.
Fish rarely use drugs, especially in the period of fish fry, because if the dosage of drugs is not well controlled, it is easy to form drug damage, resulting in the death of fish.Under normal circumstances, do not put the fry in the fish pond before the drug, if it is just finished cleaning the pond, need to wait for a period of time before the fish.
Although the fry are very small, if the number increases, the consumption of oxygen is still very large, so it is necessary to control the breeding density, if there is still hypoxia, you can use oxygen-increasing agents to increase the dissolved oxygen in the water body.Its main ingredient is sodium percarbonate, which reacts with water to produce oxygen and is almost harmless to fish.
If the time for putting the fry is in summer, because the temperature is relatively high, harmful bacteria also multiply in large numbers, and if the water quality is not good, it is very easy for them to get sick. The best way to deal with this situation is to improve the water body. It is best to use some equipment to make the water in the pond flow, which can also have a preventive effect.
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