Active Aqua Air Stone, Round, 8" x 1"

Add Dissolved Oxygen to Hydroponic Nutrient Solutions With a 8-Inch Round Air Stone

Dissolved oxygen (DO) in the nutrient solution is one of the most critical factors in hydroponic root health. When DO levels drop, roots become susceptible to anaerobic pathogens, nutrient uptake slows, and the effective working life of the nutrient solution shortens. An air stone connected to an air pump maintains DO levels by continuously dispersing air into the solution.

Active Aqua air stones use a micropore design that produces fine, consistent air bubbles — maximizing the surface area of air-to-water contact for efficient oxygen transfer. The 8 x 1-inch round format suited for mid-size to large reservoirs and recirculating systems. Suction cup mounts are included for secure positioning inside reservoirs, DWC buckets, and recirculating systems.

Key Features & Benefits

• 8 x 1-inch round format — Suited for mid-size to large reservoirs and recirculating systems, with a flat, disc-like profile that sits stably on the reservoir floor.
• Micropore diffuser construction — fine pore structure produces small, consistent bubbles that maximize air-to-water contact area for efficient oxygen transfer.
• Suction cup mounts included — secure mounting inside reservoirs, DWC buckets, and recirculating hydroponic systems without the stone drifting out of position.
• Operating pressure: standard 0.012 MPa, max 0.015 MPa — rated for continuous use with standard hydroponic air pumps; max pressure 0.015 MPa.
• Extends nutrient solution life — continuous aeration reduces pathogen risk and slows nutrient degradation, extending the usable life of the nutrient reservoir.
• Compatible with all standard air pump tubing — connects to any standard air pump outlet via flexible air tubing — no proprietary fittings required.

Who Should Use the Active Aqua 8-Inch Round Air Stone

Hydroponic growers using DWC, RDWC, NFT, or recirculating systems who need to maintain dissolved oxygen levels in their nutrient reservoir — using a 8 x 1-inch round air stone sized suited for mid-size to large reservoirs and recirculating systems.

Choosing the Right Air Stone Size and Shape

Round air stones like the 8-inch model distribute bubbles outward from the center of the disc surface, making them well-suited for reservoirs where the stone can sit flat on the bottom. For tall or narrow reservoirs, cylindrical air stones may provide better vertical bubble distribution. Use the larger 8-inch round for larger reservoirs, the 4-inch for smaller or compact systems.

Frequently Asked Questions

What air pump flow rate do I need for this air stone?

Match the air pump to the combined requirements of all air stones in the system. As a general guide, allow at least 0.5–1 LPM per air stone — larger reservoirs with multiple stones need proportionally larger pumps. Check the pump's LPM rating against total stone count.

Can I use this air stone in a reservoir that contains nutrients?

Yes — Active Aqua air stones are designed for use in hydroponic nutrient solutions. Rinse the stone periodically to remove mineral deposits that can reduce pore efficiency over time.

How do I clean and maintain the air stone?

Soak the stone in a diluted hydrogen peroxide solution (3%) or clean water to dissolve mineral deposits. Avoid harsh chemicals that could damage the pore structure. Replace the stone when flow becomes visibly reduced even after cleaning.

Does the air stone need to be submerged, or can it be positioned at the waterline?

For optimal oxygen transfer, submerge the air stone near the bottom of the reservoir. This allows the bubbles maximum travel distance through the solution, maximizing dissolved oxygen levels.