Aqua One Air Stones | Hydroponic Oxygen Diffusion & Aeration System

Dissolved oxygen is one of the most critical and most overlooked variables in hydroponic nutrient management. Roots require oxygen for aerobic respiration. Without adequate dissolved oxygen in the nutrient solution, root function slows, nutrient uptake becomes inefficient, and anaerobic conditions develop that favour pathogens over plant growth. Air stones address this directly by producing a continuous stream of fine micro-bubbles that increase dissolved oxygen levels, drive water circulation, and maintain the aerobic conditions that healthy root systems depend on.

Aqua One Air Stones are available in ceramic and flexible formats across five sizes, covering everything from compact single-plant DWC buckets through to large commercial reservoirs requiring even oxygenation along the full tank length. Ceramic models provide dense, consistent bubble output from a rigid diffuser. The 90cm flexible air stone distributes bubbles evenly along its entire length, making it the preferred choice for long rectangular reservoirs and multi-plant systems where a single point diffuser would leave dead zones at the far end of the tank.

Available Models

• 100 x 20mm Ceramic Air Stone. Compact rigid diffuser for small reservoirs, single-plant DWC buckets, and propagation systems.
• 100 x 30mm Ceramic Air Stone. Mid-size ceramic diffuser for medium reservoirs and multi-plant DWC setups.
• 130 x 30mm Ceramic Air Stone. Larger ceramic format for bigger reservoirs requiring higher bubble output from a single diffuser point.
• 50mm Ceramic Ball Air Stone. Spherical diffuser for omnidirectional bubble distribution in round or compact reservoir configurations.
• 90cm Flexible Air Stone. Long-format flexible diffuser for even bubble distribution along the full length of rectangular reservoirs, flood and drain systems, and commercial nutrient tanks.

Key Benefits

• Fine micro-bubble diffusion maximises dissolved oxygen transfer. Smaller bubbles have greater surface area relative to volume, increasing the rate of oxygen transfer into the nutrient solution compared to coarse bubble diffusers.
• Improves root zone oxygen availability. Higher dissolved oxygen levels support aerobic root respiration, improving nutrient uptake efficiency and reducing the risk of root rot and anaerobic pathogen activity.
• Drives water circulation and nutrient mixing. Continuous bubble movement prevents nutrient stratification in reservoirs, keeping EC and pH consistent throughout the solution volume.
• Supports beneficial microbial activity. Aerobic conditions created by consistent oxygenation favour beneficial microorganisms and help stabilise the nutrient solution ecosystem.
• Ceramic and flexible formats for different applications. Rigid ceramic models suit compact reservoirs and DWC buckets. The 90cm flexible model suits long tanks and commercial systems requiring even distribution across the full reservoir length.
• Compatible with all standard hydroponic air pumps. Connects directly to airline tubing from RESUN and other standard air pump systems.

Applications

• Deep Water Culture (DWC) reservoir oxygenation
• Hydroponic nutrient reservoir aeration and circulation
• NFT and recirculating system reservoir oxygenation
• Flood and drain system reservoir aeration
• Aquaponic water oxygenation systems
• Commercial nutrient tank dissolved oxygen management

Technical Specifications

• Models. 100x20mm / 100x30mm / 130x30mm / 50mm ball / 90cm flexible
• Material. Ceramic (rigid models) / flexible polymer (90cm model)
• Function. Oxygen diffusion and water aeration
• Installation. Submerged in nutrient solution
• Compatibility. Standard hydroponic airline tubing and air pumps
• Approximate Weight. Ceramic models 100 to 300g, flexible 90cm 150 to 400g

Frequently Bought Together

Air stones require an air pump to operate. The RESUN 6 Outlet Air Pump at 1320 L/hr suits smaller multi-stone setups and home DWC systems. For commercial reservoirs and multi-tank operations, the RESUN 12 Outlet Air Pump at 3000 L/hr provides enough output to run multiple air stones simultaneously. Use 8mm grommets from the Hydroponic Grommets range to seal airline pass-throughs cleanly through your reservoir wall. Running a DWC system? The Oxypot DWC Hydroponic System is a complete ready-to-run deep water culture setup that pairs directly with these air stones.