Dryden Aqua Air Diffusers

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Q: What is it made from?

316L stainless steel and plastic, which resists calcification and typically gives a service life of over 10 years.

Q: What connection size does it use?

Every length is supplied with a 1/2″ hose barb.

Q: Can I use gases other than air?

Yes — the diffuser is rated for air, nitrogen and CO2.

Self-weighted fine bubble air diffusers that sit on the floor of a tank or pond without anchoring, for aeration and biological treatment.

Price range: $260.00 through $600.00 ex GST

Model

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Categories: Aeration, Airstones / Diffusers

Applications: Pond, RAS, Water & Wastewater Treatment

Brand: Dryden Aqua

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

Model	Length	Air flow	Weight	O2 transfer at 3 m depth	Connection
DA70000	0.33 m	16 LPM (1 m3/hr)	0.5 kg	1.83 kg O2/day	1/2″ hose barb
DA70002	1.00 m	50 LPM (3 m3/hr)	1.5 kg	5.53 kg O2/day	1/2″ hose barb
DA70005	2.00 m	100 LPM (6 m3/hr)	3.0 kg	11.07 kg O2/day	1/2″ hose barb
DA70008	3.00 m	150 LPM (9 m3/hr)	4.5 kg	16.60 kg O2/day	1/2″ hose barb

Downloads

Spec Sheet Diffusers Manual

Frequently Asked Questions

How do I choose the right diffuser length?

What air flow does each diffuser handle?

How much oxygen will one diffuser transfer?

Does it need to be anchored to the floor?

What is it made from?

What connection size does it use?

Can I use gases other than air?

Spare Parts & Consumables

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Dryden Aqua Air Diffusers

Product Information

Key Features

Specifications

Downloads

Frequently Asked Questions

Spare Parts & Consumables

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