Hakko Pond Air Pumps and Aeration Systems 

Hakko air pumps can be used to create a huge column of bubbles or “air lift” rising from the bottom of a pond. This brings oxygen depleted water to the surface where the bubbles burst and create tremendous surface turbulence, circulation and aeration. HAKKO air pumps used in this manner will literally breathe life into your pond or lake.

Air Pumps For Overwintering Koi Under Thick Ice

Koi need a cold rest period in their seasonal cycle. They have evolved to endure cold water winter conditions. This cycle includes a gradual acclimation to the onset of winter and cold water over time. Koi do not die over winter because the water temperature is too cold but will perish due to lack of oxygen and toxic gases build up. Heaters will keep an open area free from ice and allow gases to escape but do not add oxygen to the water. They are also expensive to run at 1500 watts. The important aspects of aeration with air pumps are to allow O2 to enter the water column and allow toxic gasses to escape. These toxic gases include carbon dioxide, hydrogen sulfide, among others. These gases arise from decomposition of organic matter as well as from fish and other critter respiration and excretions. The earth is an incredible heat source. It will continually supply enough heat to successfully overwinter our hardy fish without the pond completely freezing with proper use of air pumps. Even with snow covering the pond except where the air hole is, you can rest assured that the water has plenty of oxygen to keep your koi healthy.