Air pumps and aeration

Oxygen at the roots.

Roots in standing water need dissolved oxygen, and a pump only delivers it if the stone spreads the flow finely. Match output in litres per hour to reservoir volume, then count the outlets you need.

Nothing matches all of those filters.

Air pumps

Rated in litres per hour, with one to ten outlets.

Hailea Professional Air Pump – Quiet High Output Aeration

  • Type adjustable diaphragm air pump
  • Output user-adjustable air flow (model dependent)
  • Housing multi-chamber muffled, low-noise
  • Mounting rubber suspension feet, sits above water line
£59.95

Hailea V Series Air Pump – 10-30 L/min with Manifold

  • Type diaphragm air compressor, non-oil-lubricated, cas...
  • V10 10 L/min, 10W, above 0.02 MPa, over 35 dB, 4-way ...
  • V20 20 L/min, 15W, above 0.02 MPa, over 40 dB, 4-way ...
  • V30 30 L/min, 25W, above 0.025 MPa, over 40 dB, 6-way...
£39.65

Enviro ET Air Pump – 30, 40 & 60 L/min Linear Diaphragm

  • Type linear diaphragm air pump, oil-free, continuous duty
  • ET30 30 L/min at 0.12 bar, 25W, 14mm outlet, 208 x 150...
  • ET40 40 L/min at 0.12 bar, 30W, 14mm outlet, 218 x 156...
  • ET60 60 L/min at 0.12 bar, 55W, 18mm outlet, 203 x 165...
£80.36

Newair Super Quiet Adjustable Air Pump – Reservoir Aeration

  • Type Adjustable diaphragm air pump
  • Models NW2 single outlet, NW3 single outlet, NW22 twin o...
  • Output by Model NW2 110 l/h · NW3 200 l/h · NW22 2 × 100 l/h
  • Reservoir Capacity Up to 190 litres per outlet
£19.49

Hailea ACO Series Adjustable Air Pump – Reservoir Aeration

  • Range Airflow 78 to 3,600 litres per hour across the eight mode...
  • Power Consumption from 2 Watts on the smallest model, rising with o...
  • Model Codes ACO-2201, ACO-2203, ACO-9601, ACO-9602, ACO-9610 ...
  • Outputs Available 78 l/hr (ACO2201), 120 l/hr (ACO2203), 192 l/hr (...
£7.49

Hailea Silent Air Pump Kit – Golf Ball Airstones

  • 4 Pot Kit 4 x 50mm golf ball airstone, 8m x 4mm airline, 1 ...
  • 6 Pot Kit 6 x 50mm golf ball airstone, 12m x 4mm airline, 1...
  • 8 Pot Kit 8 x 50mm golf ball airstone, 12m x 4mm airline, 2...
  • 12 Pot Kit 12 x 50mm golf ball airstone, 24m x 4mm airline, ...
£11.49

Charles Austen ET120 Air Pump – Quiet DWC Aeration

  • Model Charles Austen ET120
  • Air Output 120 litres per minute
  • Range Charles Austen ET series - the ET120 is the model...
  • Application Deep water culture, WaterFarm and AquaFarm, nutri...
£161.95

Hailea Adjustable Air Pumps – DWC and Reservoir Aeration

  • Type adjustable diaphragm air pump range
  • Single outlet 1.6 l/min, 1 outlet
  • Double outlet 2 x 2.0 l/min, 2 outlets
  • Four outlet 4 x 2.5 l/min, 4 outlets
£6.95

Air stones and diffusers

Bubble size decides how much of that air actually dissolves.

Round Air Stone – Fine Bubble Reservoir Aeration

£3.49

Airline, tees and manifolds

4mm line and splitters for running several stones from one pump.

4mm Air Line – Airline Tubing for DWC & RDWC

£0.30

Plastic Air Manifolds – 4mm Airline Splitters for DWC

£3.50

Air pumps and aeration for reservoirs and DWC buckets

Dissolved oxygen is what keeps roots alive in standing water, and it drops fast in a warm reservoir. An air pump pushing air through a stone keeps the water agitated and oxygen-rich, which matters most in deep water culture buckets, where roots hang directly in solution with no medium to hold air pockets. The Hailea Air Pumps range (from £6.95) covers single-bucket setups, while the Hailea Professional Air Pump (from £59.95) has the output and multiple outlets to run several buckets, or a bigger reservoir, off one unit.

Sizing a pump to your setup

As a rough rule, match litres-per-hour output to reservoir size rather than buying the cheapest pump and hoping. An undersized pump barely ripples the water and oxygen levels stay low. Split larger reservoirs across multiple air stones using a plastic manifold (from £2.50) rather than one stone working overtime, and run 4mm air line (from £0.30) from pump to stone with as few kinks as possible, since a pinched line quietly halves your output. A golf ball air stone (£1.50) is the standard choice for most single-bucket DWC systems.

Air pumps sit outside the tent, ideally somewhere quiet, and run continuously rather than on a timer. Pair one with our irrigation pumps if you are also moving water rather than just aerating it, or see tanks & reservoirs for the tank itself. Free UK delivery over £60, or call 020 3488 0419 for advice on pump sizing.