A still pond is a pond without any pumping system, either because it is too large to pump and filter economically or because a waterfall or fountain is not desired. For a natural appearance, the pond should be located in a flat area at the lowest part of the site. For effective circulation, a depth of 48" at the center is recommended.

In the illustration, the pond is excavated as a series of terraces. Protection fabric is laid over the soil and covered with a rubber pond liner. For larger ponds, several pond liners are seamed to obtain sufficient size. A compressor pumps air to a weighted diffuser positioned at the bottom center of the pond. The diffuser generates millions of air bubbles that float to the surface, in the process lifting the cool water from the bottom of the pond. At the surface this water spreads outward, releasing waste gases into the atmosphere and absorbing oxygen. Since this water is cooler than the surface water, it sinks to the bottom and completes the water circulation loop.

still pond

STILL POND KITS: We can custom design a complete kit with everything required to build a still pond of any size and shape. Typical components are shown below: click on an image or title for more information. When construction is completed, we can also ship a package of appropriate plants.

rubber roll

rubber liners

diffuser on base

diffuser assemblies

linear compressor



protection fabric

protection fabrics

aeration tubing


gate valve

valves and fittings



biological clarifiers

fabric pot

fabric planting pots



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