Self-aspirating
The venturi core accelerates water through a restriction, dropping pressure and drawing air in naturally through the suction port. No air compressor, blower or extra power draw.
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MBV Micro Bubble Venturi | Self-Aspirating Aerator | Biotech Aquatica
MBV Micro Bubble Venturi | Self-Aspirating Aerator | Biotech Aquatica
BTA fine bubble aeration
MBV Micro Bubble Venturi
An optimised venturi aerator generating milli and micro bubbles from 60 µm to 2 mm. No compressor required — air is drawn naturally into the water stream for efficient gas transfer in aquariums, aquaculture and RAS.
60 µm–2 mmbubble range
5–70 m³/hflow range
Up to 4outlet versions
Venturi core
Water in → air drawn in naturally →
milli + micro bubbles out
60 µm to 2 mm · no compressor needed
milli + micro bubbles out
60 µm to 2 mm · no compressor needed
Self-aspirating venturiMilli + Micro Bubbles · 60 µm to 2 mmMultiple outlet versions
✓ No compressor required✓ Milli + micro bubble mix✓ O₂ and O₃ compatible✓ Metric + imperial plumbing options
The MBV Micro Bubble Venturi is an optimised venturi aerator that uses the energy of your existing water pump to draw air naturally into the flow and shear it into a full spectrum of fine bubbles — milibubbles from 100 µm to 2 mm and microbubbles from 60 to 100 µm. It is the venturi counterpart to our NBN Nano Bubble Nozzle range, delivering approximately half the gas transfer rate of the equivalent NBN model at the same water flow — with the simplicity of a self-aspirating design that needs no air compressor.
The MBV difference
Why a venturi aerator?
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Milli + micro bubble mix
Generates the full fine bubble spectrum — milibubbles from 100 µm to 2 mm for rapid gas exchange, plus microbubbles from 60 to 100 µm for longer in-water dwell time.
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Plumbing flexible
Available in a range of inlet and outlet sizes across metric and imperial-compatible dimensions, with single and multiple outlet versions to suit your manifold layout.
Features
Built for real systems
⚡
No compressor
Air is drawn in by water flow alone — one pump does all the work.
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O₂ and O₃ ready
The suction port accepts atmospheric air or an oxygen or ozone gas supply.
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Multiple outlets
Two and three/four outlet versions distribute bubbles across wider tanks or multiple cells.
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Flexible connection
Threaded and solvent-weld options in sizes matching common metric and imperial pipework.
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Aquaculture grade
Designed for aquarium, aquaculture and RAS duty in fresh and salt water.
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Simple install
In-line fitting with standard hose and valve accessories; no specialist tools.
Specifications
The full MBV range
| Model | Flow Rate | Inlet | Outlet(s) | O₃ GTR (L/h) | O₂ GTR (g/h) | Nat. Air O₂ GTR 10–25 ppt |
Nat. Air O₂ GTR Freshwater |
|---|---|---|---|---|---|---|---|
| MBV05-1 | 5 m³/h | ½" | ½" / ¾" / 1" / 1¼" | 22–68* | 20–60* | 16–19* | 12–15* |
| MBV10-1 | 10 m³/h | 1" | ¾" / 1" / 1½" / 2" | 44–131* | 38–119* | 34–40* | 26–31* |
| MBV20-1 | 20 m³/h | 2" | 1½" | 80–240 | 70–260 | 50–60 | 35–45 |
| MBV30-1 | 30 m³/h | DN80 | 2" | 120–360 | 105–315 | 85–100 | 60–70 |
| MBV50-1 | 50 m³/h | DN80 or 4" | DN80 or 2" | 225–675 | 200–600 | 145–155 | 95–105 |
| MBV70-1 | 70 m³/h | 4" or DN80 | DN80 | 310–905* | 270–835* | 198–245* | 132–182* |
| MBV30-2 | 30 m³/h | DN80 | 2" + 2" | 120–360 | 105–315 | 85–100 | 60–70 |
| MBV50-2 | 50 m³/h | 4" or DN80 | 2" + 2" | 225–675 | 200–600 | 145–155 | 95–105 |
| MBV70-2 | 70 m³/h | 4" or DN80 | DN80 + DN80 | 310–905* | 270–835* | 198–245* | 132–182* |
| MBV30-4 | 30 m³/h | DN80 | 2" × 4 | 120–360 | 105–315 | 85–100 | 60–70 |
| MBV50-3 | 50 m³/h | 4" or DN80 | DN80 × 3 | 225–675 | 200–600 | 145–155 | 95–105 |
| MBV70-3 | 70 m³/h | 4" | DN80 × 3 | 310–905* | 270–835* | 198–245* | 132–182* |
* Interpolated from neighbouring NBN models. GTR at 50% of the equivalent NBN nozzle.
Connections and options
Plumbing made simple
Imperial SCH40
½" · ¾" · 1" · 1¼" · 1½" · 2" · 4" — standard SCH40 fittings fit directly.
Metric DN80
DN80 connections suit metric pressure pipe or DWV.
Multiple outlets
Two, three and four-outlet versions for wider tanks and multi-cell distribution.
Air hose and valve
2 m air hose and suction valve included with every unit.
Complete the system
Pairs well with
NBN Nano Bubble Nozzle
Need the full nano bubble performance? The NBN range delivers approximately double the gas transfer rate of the equivalent MBV at the same water flow. View the NBN range
Ozone generators
The MBV suction port accepts ozone gas for oxidation and disinfection duty. Contact us for compatible O₃ supply options.
What is included
In the box
MBV aerator body
Venturi aerator in your selected size and outlet configuration.
Air hose
2 m air hose included with each unit.
Air valve
Suction-side air valve for gas flow regulation.
Choosing your model
Which MBV is right?
Match flow to your pump
Select the MBV model whose rated flow (5–70 m³/h) matches your pump\'s circulation rate at operating head. If your system sits between models, size up for headroom. Multiple outlet versions suit wider tanks or multi-cell distribution — gas transfer stays the same because total flow is unchanged. Pump recommendations are application-specific — contact us with your system volume and pump details for sizing.
FAQ
Common questions
Do I need an air compressor?
No. The MBV is self-aspirating — the venturi draws air naturally from atmosphere using only the energy of your water pump.
What bubble sizes does it produce?
A full fine bubble spectrum: milibubbles from 100 µm to 2 mm and microbubbles from 60 to 100 µm.
How does it compare to the NBN nozzle?
At the same water flow rate, the MBV delivers approximately 50% of the gas transfer rate of the equivalent NBN Nano Bubble Nozzle. The trade-off is simplicity: no compressor, no gas supply equipment.
Can I run oxygen or ozone through it?
Yes. The suction port accepts atmospheric air, oxygen or ozone gas supply. Use appropriate gas-rated fittings for O₂/O₃ service.
What pipe sizes does it connect to?
½" through 4" SCH40 imperial, plus DN80 metric. See the specification table above.
Which model should I choose?
Match the rated flow to your pump\'s circulation rate. For help sizing, contact Biotech Aquatica with your system volume and pump details.
Not sure which model?
We are happy to help you size the right MBV for your system. Send us your system volume, pump details and target gas transfer and we will recommend the right model and outlet configuration.
Contact us for sizingWholesale and trade enquiries
Biotech Aquatica supplies the MBV Micro Bubble Venturi range to aquarium retailers, aquaculture operations and RAS integrators across Australia. Trade pricing and volume arrangements available.
Get trade pricingBiotech Aquatica · www.btaqua.com.au
