Air pump AP-200

While the standard pond pump moves the wateraround, theair pump (aerator)provides the essentialsupply and removal of gases. In technical terms, we call this the active aeration of the ecosystem.

Here are the specific functions of an AquaForte air pump (e.g. from the popularV-seriesorAP-series):

1. Direct oxygen enrichment

This is the most obvious effect. Air is pressed into the water in fine bubbles through diffuser stones.

• Vitality:Fish (especially koi) have a high oxygen demand, particularly at water temperatures above20°C, as warm water can physically hold less oxygen.

• Emergency preparedness:On humid summer days or during algal blooms, the oxygen levels drop significantly at night – the air pump prevents the dreaded "fish kill".

2. Support of biology (filter bacteria)

A pond filter is only as good as the bacteria that live in it.

• Aerobic bacteria:The beneficial bacteria in the filter (Nitrosomonas and Nitrobacter) require oxygen to convert toxic ammonia and nitrite into non-toxic nitrate.

• Efficiency increase:Many users place diffusers directly in the filter chamber to maximise the breakdown performance of the filter.

3. Gas exchange and degassing

The rising air bubbles create a vertical current.

• CO2 Removal:Excess carbon dioxide is released more efficiently at the surface.

• Decaying gases:Harmful gases that can form at the bottom of the pond through decomposition processes are transported upwards and released.

4. Ice-free holder in winter

In winter, the air pump serves a mechanical protective function.

• The rising bubbles keep the water surface constantly in motion at one point, preventing it from freezing even in moderate frost.

• This ensures that gas exchange is maintained even with a closed ice cover, allowing decaying gases to escape.