Importance of fish pond aeration: Relationship between dissolved oxygen and aquaculture efficiency

In aquaculture, dissolved oxygen is one of the key factors affecting the efficiency of aquaculture. Fish pond aeration, as an effective means to increase dissolved oxygen, is of great significance to ensure the healthy growth of fish, improve the production and economic benefits of aquaculture.

First, the impact of dissolved oxygen on fish growth and health
(1) Promote growth and development
Dissolved oxygen is necessary for the growth of fish. Studies have shown that the growth rate and weight gain of fish in water bodies with sufficient dissolved oxygen are higher than those in water bodies with insufficient dissolved oxygen. Sufficient dissolved oxygen can ensure the normal respiration and energy metabolism of fish, promote the digestion and absorption of food, and thus support the rapid growth of fish.
(2) Enhance immunity and disease resistance
Dissolved oxygen also has a significant effect on the immune system and disease resistance of fish. In an environment with sufficient dissolved oxygen, the immune system of fish is more sound, and it can effectively resist the invasion of pathogens and reduce the occurrence of diseases. On the contrary, insufficient dissolved oxygen can lead to decreased immunity of fish, increase the risk of disease, and even trigger mass mortality.
(3) Affecting reproduction and offspring quality
Dissolved oxygen is also crucial for fish reproduction. Suitable dissolved oxygen level can promote the development of fish gonads and increase reproductive success rate. In addition, sufficient dissolved oxygen can also improve the hatching rate of fish eggs and the survival rate of young fish, resulting in higher yields for breeders.

Second, the influence of dissolved oxygen on water quality
(1) Inhibit the generation of harmful substances
Sufficient dissolved oxygen can inhibit the formation of harmful substances such as ammonia nitrogen and nitrite in water. These substances are easy to accumulate in low-oxygen environments, posing a serious threat to fish health. Increasing dissolved oxygen through aeration can effectively reduce the concentration of these harmful substances and improve water quality.
(2) Promote the decomposition of organic matter
When the dissolved oxygen is sufficient, the beneficial microorganisms in the water can efficiently decompose organic matter, reduce the accumulation of silt at the bottom of the pond, and prevent the deterioration of the water quality. This not only helps maintain a good water environment, but also reduces the risk of disease transmission.

Third, the role of fish pond aeration
(1) Increase dissolved oxygen
Aeration increases the dissolved oxygen content of the water by injecting air or pure oxygen into it. Common aeration methods include air aeration and pure oxygen aeration. Although the cost of air aeration is low, the oxygenation efficiency is limited. Pure oxygen aeration can improve the dissolved oxygen level more efficiently.
(2) Improving water circulation
Aeration can also promote the circulation of water and make the distribution of dissolved oxygen in water more uniform. This is particularly important for high-density farming, which can effectively prevent the occurrence of local hypoxia.
(3) Reduce excessive algae growth
Although algae can produce oxygen through photosynthesis, they also consume oxygen at night or when there is insufficient light. In addition, excessive algae growth can lead to deterioration of water quality. By increasing water flow through aeration, algal overgrowth can be reduced.

Fourth, reasonable aeration and improvement of aquaculture benefits
(1) Select the appropriate aeration equipment
Depending on the size, depth and density of the fish pond, it is important to choose the right aeration equipment. For example, microporous aeration technology is suitable for high-density culture and can effectively improve the dissolved oxygen efficiency. The water-wheel aerator can promote the discharge of residual bait and feces by pushing the water flow.
(2) Monitoring and regulation
Regular monitoring of dissolved oxygen levels is key to ensuring the effectiveness of farming. The dissolved oxygen in the cultured water should be kept above 5 to 8 milligrams per liter and at least 3 milligrams per liter at all times. Through the rational use of aeration equipment to avoid supersaturation or insufficiency of dissolved oxygen, breeding efficiency can be effectively improved.
(3) Reduce breeding costs
Reasonable aeration can not only improve the growth rate and survival rate of fish, but also reduce feed waste and disease treatment costs. In the long term, this will significantly improve the efficiency of farming.

Fifth, Conclusion
Fish pond aeration is an indispensable and important link in aquaculture. By increasing the dissolved oxygen, it can not only promote the growth and health of fish, but also improve the water quality and reduce the occurrence of disease, thus significantly improving the efficiency of aquaculture. Reasonable selection and use of aeration equipment, combined with scientific aquaculture management, will bring higher economic returns to aquaculture.