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Rubber Bumper Diffuser

Medium-pore rubber diffuser for straightforward aeration in aquariums, ponds and other aquatic systems. The durable, washable body can be cleaned and returned to service rather than replaced. Three lengths deliver 14, 21 and 28 LPM, with 6 mm, 8 mm and 12 mm barb options.

Price range: $16.00 through $28.00 ex GST

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Rubber Bumper Diffuser
Rubber Bumper Diffuser - Image 2

Product Information

Key Features

  • Medium-pore rubber diffuser for general aeration duty across aquariums, ponds and other aquatic systems
  • Durable, washable body that can be cleaned and returned to service rather than replaced
  • Barb connection options in 6 mm, 8 mm and 12 mm
  • Three lengths — C30D106C, C30D109C and C30D112C at 100, 200 and 300 mm, all 30 mm diameter
  • Air flow of 14 to 28 LPM per diffuser depending on length
  • Medium pore size gives a coarser bubble than a fine-pore ceramic diffuser, suiting general aeration and mixing rather than pure oxygen dosing
  • Sizing — divide your total air flow by the per-diffuser flow rate below (14, 21 or 28 LPM) to get the number of diffusers required.

Specifications

ModelSKUDimensions (L × Ø)Air flow rateBarb connectionPore gradeMaterial
C30D106CC30D106C100 mm × 30 mm14 LPM6 mm / 12 mmMedium poreRubber
C30D109CC30D109C200 mm × 30 mm21 LPM6 mm / 12 mmMedium poreRubber
C30D112CC30D112C300 mm × 30 mm28 LPM6 mm / 12 mmMedium poreRubber
8 mm barb option———8 mm — available on requestMedium poreRubber

Frequently Asked Questions

How many diffusers do I need?
Divide your total air flow in LPM by the per-diffuser rate – 14 LPM for the C30D106C, 21 LPM for the C30D109C or 28 LPM for the C30D112C – and round up.
What pressure is required to run it?
It is a low-pressure diffuser run from an air pump or blower, which needs to overcome the water depth above the diffuser plus the resistance of the rubber element.
Does it suit pure oxygen or air service?
It is a medium-pore air diffuser for general aeration; pure oxygen dosing calls for a fine-pore ceramic diffuser, which makes far smaller bubbles.
How does this compare with a ceramic diffuser?
Medium-pore rubber gives a coarser bubble for mixing and general aeration, while ceramic produces 100 to 400 micron bubbles for much higher gas transfer efficiency.
How do I clean it?
The body is washable – scrub off biofilm and soak in a dilute acid bath to shift calcium scale, then rinse thoroughly before returning it to service.
Which barb size should I order?
Barb connections are available in 6 mm, 8 mm and 12 mm – match the barb to your existing airline.
Where is it typically used?
Aquariums, ponds and other aquatic systems needing straightforward, reliable aeration.

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