In the aquaculture industry, the Roots blower, as the "heart" of oxygenation equipment, is of undeniable importance. Recently, we've found that some farmers, due to lack of professional guidance in selecting Roots blowers, have suffered a surge in fish fry mortality, causing significant losses to their production. Today, we're sharing some key points on choosing Roots blowers to help you avoid such problems.

I. The Impact of Roots Blowers on Fish Fry Farming

The main function of a Roots blower is to supply sufficient oxygen to the aquaculture. In high - density farming environments, the dissolved oxygen level in the water is a key factor affecting the growth and survival of fish fry. If the blower is improperly selected, the following problems may occur:

1. Insufficient Oxygen Supply: If the blower's air volume or air pressure is inadequate, it cannot effectively deliver oxygen to the bottom of the water body, leading to hypoxia in the bottom layer. Fish fry living in a low - oxygen environment for a long time will grow slowly, have reduced immunity, and may even die in large numbers.

2. Noise Interference: Some low quality Roots blowers produce excessive noise during operation, which can interfere with the normal physiological activities of fish fry. Fish fry are sensitive to environmental changes, and long - term exposure to high - noise environments can easily cause stress responses, affecting their appetite and growth, and may even lead to deformities or death.

3. Unstable Airflow: Poor quality blowers may result in unstable airflow, which fluctuates in strength. This unstable airflow can cause violent water fluctuations, and fish fry may be injured by the water current, making their wounds susceptible to bacterial infections and diseases, thus increasing the mortality rate.

To avoid the above problems, farmers should consider the following aspects when selecting Roots blowers:

Air Volume and Air Pressure Matching

Air Volume: Calculate the required air volume based on the area, water depth, and stocking density of the breeding pond. Generally, for every mu of water surface (with a water depth of 1 meter), an air volume of about 10 - 15 cubic meters per hour is needed. If the stocking density is high or the water is deeper, the air volume should be increased accordingly.

Air Pressure: The air pressure should ensure that oxygen can be delivered to the bottom of the water body. For shallow ponds, an air pressure of 3 - 5kPa is sufficient; for ponds with a water depth of more than 2 meters, the air pressure should be chosen to be above 5 - 8kPa. If the air pressure is insufficient, oxygen cannot reach the bottom layer, resulting in hypoxia there.

The selection and use of Roots blowers are crucial to fish fry farming. We hope that all farmers will pay attention to and take seriously the selection and use of Roots blowers. If you have any questions during the selection process, feel free to consult us.