Adding aeration to your pond or private lake is the best method to control water quality and algae. It is very important not to overlook aeration in small basins and in ponds which have a large organic load and that are typically mucky at the bottom. We strongly promote air diffusion at the bottom of the pond as the best form of aeration.

Aeration of the pond is basically the injection of micro-air bubbles into the water to supply oxygen to your pond, lake, well, golf-course water body, etc. The water of the pond is turned and circulated from bottom to top by air diffuser plates that oxygenate the entire pond. Aeration is effective all year round and is a key ingredient in maintaining a healthy aquatic environment. The effects of combining an aeration system with treatments of safe, natural bacteria that feeds on organic sludge, algae and muck will return your pond to vibrant health.

Building your systemThe heart of your aeration system is the compressor. PPM compressors are quiet, small, energy efficient compressors that pump a steady and reliable flow of air to your bottom-mounted diffusers, via the appropriate length of self-sinking tubing, providing aeration to your pond. Once you have accurately measured the size of your pond you can calculate the most affordable compressor, the length of tubing and the number of diffusers necessary to maintain your pond.

Before you begin
In order to properly gauge the size of the compressor and the number of aerating discs you will need there are two important factors to consider: the true depth of the pond and the shape of the pond.

This pond has a regular shape and a single deep area so the recommended aeration system would be the appropriate sized PPM compressor, a single AirStation diffuser and the required length of self-sinking tubing. If you prefer to have your compressor further from the pond then simply run a line of regular tubing from the compressor and then connect the more expensive self-sinking tubing at the pond edge. The compressor may be placed up to 1 km away from the diffuser.

Choosing the right sized compressor
In order to choose the right compressor the accurate depth of your pond or lake must be measured. Guessing or approximating may result in an over or undersized compressor being used which may affect the quality of the aeration and the life-expectancy of your compressor. If your pond has varying depths then try to find the deepest point and use that as your guide. Poor results may be encountered if you do not begin with an accurate measurement of your pond depth as the depth of your pond determines the number of aeration discs or assemblies you require.

Diffusion systems
Our diffusers are circular discs constructed of robust plastics and reinforced rubber components that vastly outperform the last generations of air-stone diffusers. Our preferred diffuser is the CoActive Airstation which is an easy-sinking assembly with two 9" diffuser discs attached to a practical footing that is easy to install and connect to your compressor. They are simple to install and require no additional weights, tied bricks or buckets to position them in strategic locations. Due to the fact that this assembly is easy to anchor, self-uprights and keeps the discs raised from the pond bottom we have found that they outperform the single discs in ponds of depths greater than 4 feet.

Once the depth is known you must consider the shape of your pond
A circular-shaped pond with a single deep area and an equally proportional interior grade may require only one diffusion disc or AirStation placed at the deepest point. An irregular shaped pond with many variations in depth and bank slope may require the installation of one or more diffusers. While the addition of any aeration is better than none, we have found that optimum benefits are attained when a pond is correctly fitted with a system conforming to accurately measured dimensions and the placement of the correct number of aerating diffusers..

Limitations of the compressor and diffusers
Our CoActive diffusers operate best between 1 and 3 CFM. Every 2' 3" (2 foot 3 inch) of water equals 1 PSI. Use this information to help calculate which compressor is best for your pond. Generally a pond requiring one AirStation with depths up to 9 feet will require a compressor in the PPM 60 to PPM 100 range while a pond of up to 12 feet deep requiring 2 or more airstations will require a compressor ranging from the PPM 120 to the PPM 200. This is only a general guide and a pond with an irregular shape, steep slope or many depth variations will require adjusting the optimal compressor choice accordingly.


One very common aquatic weed problem in ponds is filamentous algae. The presence can degrade water quality and the enjoyment and value of your pond. Excessive algae growth, if left unchecked can cause oxygen depletion as it decomposes either as a result of natural die-off or herbicide or fertilizer applications. Early and regular control is important to reduce the problems like muck and foul odours associated with filamentous algae.

Filamentous algae, also known as "pond scum," forms dense hairlike strands that can form thick floating mats. Its growth begins on submerged objects on the pond bottom. As it grows, the algae gives off oxygen that becomes entrapped in the mat of strands. This gives it buoyancy and causes it to rise to the surface where it frequently covers large areas of the pond. Filamentous algae is often a persistent problem because it reproduces by plant fragments, spores and cell division. Treatment with a beneficial bacteria can solve this problem.
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Pond aeration
is the ultimate method for the control of pond water quality and algae. Do not to overlook aeration in small basins and in ponds which have a large organic load and that are typically mucky at the bottom. I heartily promote air diffusion at the bottom of the pond as the best form of aeration. Fountains and cascades are indeed pleasing to the eye and do indeed offer some surface aeration but air diffusion is the most efficient way to improve and maintain a healthy lake or pond. Read more about aeration


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