Common aeration devices in aquaculture include aerators, floating aerators, disc aerators and oxygen sprayers. Their main advantages and disadvantages are as follows:
1. Aerators (blower + diffuser systems)
Suitable for shallow water. Air is pushed into the water mechanically or by wind to raise dissolved oxygen.
Pros: simple structure, easy maintenance, relatively low price.
Cons: higher power consumption, cannot be used in deep water.
2. Floating aerators
Suitable for medium-to-deep water. A rotor-type oxygen booster pump feeds oxygen to distribution lines, releasing it through multiple outlet heads.
Pros: works in deep water, stable operation, good aeration effect.
Cons: the booster pump and outlet heads need regular replacement; maintenance cost is higher.
3. Disc aerators
Suitable for small farms. A powered rotating disc at the bottom adds oxygen to the water.
Pros: simple structure, easy installation, relatively low price.
Cons: not suitable for deep water; aeration efficiency is lower than other types.
4. Oxygen sprayers
Suitable for large farms. High-pressure oxygen is sprayed into the water to form bubbles and increase dissolved oxygen.
Pros: works across different water depths, good aeration effect, long service life of the spray heads.
Cons: higher equipment price and maintenance cost.
5. Three-lobe Roots blowers
The most widely used option in aquaculture: large air output and high discharge pressure, so one unit can supply oxygen to multiple ponds.