AquaSub Aerator

Operating Principle

The Aquasub aerator (models Aquasub 1, 2, etc.) is a submersible vertical jet aerator used in aquaculture, fish farming, and pond management to improve oxygenation and water circulation.

It consists of:

• a submersible electric motor (typically 0.75–3 kW),

• an impeller that drives water upward,

• and a diffuser that projects water to the surface, creating a powerful aeration by splashing and mixing.

Bottom water is drawn in and projected to the surface, increasing contact with air and promoting:

• oxygen transfer (O₂/CO₂ exchange),

• removal of harmful gases (NH₃, H₂S),

• thermal mixing of the water column.

Advantages

• Highly efficient in warm or stagnant water.

• Strong vertical mixing, reduces stratification and anoxic zones.

• Easy installation and mobility.

• Low maintenance and low clogging risk compared to air diffusers.

Disadvantages

• Higher energy consumption than fine-bubble diffusers.

• Moderate noise at the water surface.

• Less efficient in deep ponds (>3 m) for full-column mixing.

Typical Applications

• Fish ponds (carp, trout, tilapia, etc.)

• Rearing or holding tanks

• Ponds with high organic load

• Prevention of summer oxygen depletion and fish kills