Sweetwater Air Diffusers

Premium bonded silica air diffusers machined from a solid block of glass-bonded silica, producing a consistent medium-to-fine bubble. Four models cover 5 to 28 LPM on a 1/4″ (6 mm) hose barb, with air resistance under 0.25 psi so they run happily on economical low-pressure blowers. Well suited to tanks, ponds, hatchery and live holding systems where clog-resistant, low-maintenance aeration matters.

Price range: $8.00 through $50.00 ex GST

Product Information

Key Features

  • Machined from a solid block of glass-bonded silica for a consistent medium-to-fine bubble
  • Passes dust and particles up to 30 microns, so no costly air filter is needed
  • Low air resistance — under 0.25 psi — so economical low-pressure blowers will run them
  • Four stocked models from 5 to 28 LPM, all with a 1/4″ (6 mm) hose barb
  • Self-weighting with typical tubing lengths — no anchoring required
  • Clog resistant; a simple acid bath clears calcium build-up or bacterial growth and restores performance
  • Withstands high water temperatures, though water above pH 9.0 shortens diffuser life
  • 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

ModelAir flowSize (length × Ø)Gas connection
AS35 LPM5 cm × 2.5 cm1/4″ (6 mm) hose barb
AS8L10 LPM8 cm × 4 cm1/4″ (6 mm) hose barb
AS15S14 LPM15 cm × 4 cm1/4″ (6 mm) hose barb
AS30S28 LPM30 cm × 4 cm1/4″ (6 mm) hose barb

Frequently Asked Questions

How do I choose the right size diffuser?
Divide the total air flow your system needs by the per-diffuser rate — 5 LPM for AS3, 10 LPM for AS8L, 14 LPM for AS15S or 28 LPM for AS30S.
How much air does each diffuser take?
AS3 takes 5 LPM, AS8L 10 LPM, AS15S 14 LPM and AS30S 28 LPM.
What are they made from?
Each diffuser is machined from a solid block of glass-bonded silica.
Do I need an air filter?
No — dust and particles up to 30 microns pass straight through, so an air filter is not required.
Will they run on a low-pressure blower?
Yes — air resistance is under 0.25 psi, which suits economical low-pressure blowers.
How do I clean them?
A simple acid bath clears calcium build-up or bacterial growth and restores the original bubble pattern.
What size connection do they use?
All four stocked models use a 1/4″ (6 mm) hose barb.

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