Air Pumps

Dissolved oxygen is one of the most important — and frequently overlooked — factors in hydroponic growing success. Roots require a continuous supply of oxygen for aerobic respiration, and depleted dissolved oxygen in nutrient solution causes root stress, reduced nutrient uptake and rapid pathogen colonisation. A quality air pump maintains the dissolved oxygen levels in your reservoir or nutrient solution that your roots depend on for vigorous, healthy growth.
Air Pumps for DWC and Hydroponic Reservoirs
In Deep Water Culture (DWC) systems, the roots hang directly in the nutrient solution — making dissolved oxygen absolutely critical. A quality air pump drives air through airstones positioned at the base of the reservoir, creating a continuous stream of fine bubbles that oxygenate the solution and prevent stratification. For a standard 50–100L DWC reservoir, a pump capable of 10–15 L/min airflow is generally adequate at comfortable temperatures. As water temperature rises above 20°C, dissolved oxygen levels fall — increase airflow or cool the reservoir to compensate.
Air pumps are also widely used in soil and coco grows for aerated compost tea production — a technique that rapidly multiplies beneficial microorganisms for application to the root zone. For compost tea, a larger pump capable of 30–60 L/min provides the vigorous aeration needed to maintain aerobic conditions throughout the brewing period.
Choosing the Right Air Pump
Match pump capacity to your reservoir volume. Larger pumps with multiple outlets allow several airstones to be run simultaneously in large reservoirs or multi-plant systems. Single-outlet pumps suit small individual reservoirs. Use high-quality silicone tubing for connections — it is more durable and heat-resistant than standard PVC airline and maintains airtight joints that prevent pressure loss.
We have been supplying air pumps to UK hydroponic growers since 2017. Browse the full range below.