They were one of the first pond/lake aerators on the market. I learned a lot from these units and their good information and aeration philosophy. The unit works. It does mix water and the diffuser is low maintenance; overall acceptable. However after using a couple of them in my "aeration early days", IMO the unit has drawbacks for at least two reasons, plus I now consider it dated technology. The unit was good in the early days of pond aeration when little else was available. 1. The diffuser relies of the vertical tube affect which results in I think lower flows since the bubble plume is contained in a tube for its initial bubble release. I used the various versions tube style diffusers, in the 1980's. In my experience the tube results in reduced flow compared to if the diffuser was 6"-7" dia or more and as a full membrane plate/s. My experience is a larger diameter membrane would be much better and produce more ultimate water flow. 2. the "bubble maker" is too small thus resulting in larger bubbles and fewer bubbles. If you buy it check to see what type of compressor it is and how much air flow (cfm) it produces. Early compressor models had low air flows. Ideally you want 3-5cfm.
The shallower the pond is the more you need to spread the diffuser out to a larger area and not contain the bubble plume in a tube. Tubes might be better in deeper applications than shallow applications. In your small pond (140K gal) you can use a compressor that produces 1 to 3cfm if you have a good small bubble diffuser.
Last edited by Bill Cody; 08/21/13 01:45 PM.
