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Dryden Aqua Air Diffusers

A semi-flexible, high-efficiency fine bubble air diffuser available in four lengths from 0.33 to 3 metres, handling 16 to 150 LPM of air. Internal ballast keeps it on the floor of the tank or pond with no anchoring, and 316L stainless steel construction resists calcification for a service life typically over 10 years. With oxygen transfer up to 5 kg O2 per kWh it suits aquaculture, pond aeration and water and wastewater treatment, including drop-in retrofits.

Price range: $260.00 through $600.00 ex GST

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Dryden Aqua Air Diffusers
Dryden Aqua Air Diffusers - Image 2

Product Information

Key Features

  • Semi-flexible tubular fine bubble diffuser with internal ballast — it sits on the tank or pond floor without anchoring
  • Four lengths from 0.33 to 3 metres, handling 16 to 150 LPM of air (1 to 9 m3/hr)
  • Oxygen transfer efficiency up to 5 kg O2 per kWh — ahead of surface aerators (1–2 kg) and membrane diffusers (2–3 kg)
  • Low pressure differential of less than 86 mbar (1.25 psi), so blower power stays down
  • 316L stainless steel and plastic construction that resists calcification
  • Rated for air, nitrogen or CO2 service
  • Easy to clean, with a typical service life of over 10 years — a simple drop-in retrofit for existing tanks and ponds
  • Sizing — divide your total required air flow in LPM by the per-diffuser flow rate in the table below to get the number of diffusers.

Specifications

ModelLengthAir flowWeightO2 transfer at 3 m depthConnection
DA700000.33 m16 LPM (1 m3/hr)0.5 kg1.83 kg O2/day1/2″ hose barb
DA700021.00 m50 LPM (3 m3/hr)1.5 kg5.53 kg O2/day1/2″ hose barb
DA700052.00 m100 LPM (6 m3/hr)3.0 kg11.07 kg O2/day1/2″ hose barb
DA700083.00 m150 LPM (9 m3/hr)4.5 kg16.60 kg O2/day1/2″ hose barb

Downloads

Spec SheetDiffusers Manual

Frequently Asked Questions

How do I choose the right diffuser length?
Divide the total air flow your system needs by the per-diffuser rate — 16 LPM at 0.33 m, 50 LPM at 1 m, 100 LPM at 2 m or 150 LPM at 3 m.
What air flow does each diffuser handle?
16 LPM for the 0.33 m, 50 LPM for the 1 m, 100 LPM for the 2 m and 150 LPM for the 3 m diffuser.
How much oxygen will one diffuser transfer?
Up to 5 kg of oxygen per kWh — at 3 m depth and 20 degrees C a 3 m diffuser transfers about 16.6 kg of O2 per day.
Does it need to be anchored to the floor?
No — the internal ballast is self-weighting, so it stays on the bottom of the tank or pond on its own.
What is it made from?
316L stainless steel and plastic, which resists calcification and typically gives a service life of over 10 years.
What connection size does it use?
Every length is supplied with a 1/2″ hose barb.
Can I use gases other than air?
Yes — the diffuser is rated for air, nitrogen and CO2.

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