Pond Boss Forums AERATION Systems questions Diffuser setup

Circular or disk diffusers will have a slightly greater upwelling flow - maybe 10% more than tube diffusers. IMO tube diffusers are easier to clean and mount. Both styles have their benefits. I use both types in my pond. Multiple diffusers have more slits and bubbling surface area operating thus more water will be moved assuming a reasonable flow of air to each diffuser. with adequate air flow to each the volume of water moved is very close to the multiple of the number of diffusers. This has been tested and is represented on the Vertex website. Oversupplying air flow to a single diffuser results in the slits being forced open wider producing larger bubbles resulting in less water movement. The general rule in air lift technology is the smaller the bubbles and the more bubbles one makes the more water that is moved.

Many membrane diffusers have built-in checkvalves. One should verify the built-in check valve feature when shopping for the various types or styles of diffusers. Some have them some don't.