Point Four Microbubble Oxygen Diffuser (MBD)

Q: How do I choose the right MBD size?

Divide the gas flow your tank needs by the recommended per-diffuser flow — 0.75, 1.5, 3, 6, 9 or 12 LPM — to get the number of diffusers.

Q: What oxygen flow does each model take?

Recommended flows run from 0.75 LPM on the PMBD75 up to 12 LPM on the MBD1200, with maximum flows around three times that at 3.5 bar.

Q: What supply pressure do they need?

Run each diffuser at a bubbling pressure of 25–35 psi (1.7–2.4 bar) from a regulated supply.

Q: How efficient are they?

Gas absorption is in excess of 80%, depending on water depth and gas flow rate.

Q: What are they made from?

An ultra-fine pore ceramic plate set in a rigid aluminium base with solid brass fittings; the PMBD75 uses a weighted plastic base.

Q: What gas connection do they use?

PMBD75 and MBD100 use a 6 mm (1/4″) hose barb; MBD300 and larger use a 1/4″ NPT female thread.

Q: How do I maintain them?

The ceramic plate needs periodic cleaning to keep bubbling consistent, and the plate-in-base build is straightforward to service or replate.

A ceramic plate diffuser for dissolving pure oxygen or carbon dioxide into aquaculture tanks, holding systems and live transport.

Price range: $130.00 through $500.00 ex GST

Option

Clear

Categories: Aeration, Airstones / Diffusers, Oxygen & Ozone

Applications: Hatchery, Live Holding & Purging, Live Transport, RAS

Brand: Pentair

Point Four Microbubble Oxygen Diffuser (MBD)

Point Four Microbubble Oxygen Diffuser (MBD) - Image 2

Product Information

Key Features

Ultra-fine pore ceramic plate produces a dense cloud of bubbles roughly 100–500 microns across
Gas absorption in excess of 80%, depending on depth and flow rate — it cuts the cost of bottled or generated oxygen
Flat plate design keeps bubbling uniform across the whole surface and limits bubble coalescence
Six models from the compact PMBD75 at 0.75 LPM up to the 1.3 metre MBD1200 at 12 LPM
Rigid aluminium base with solid brass fittings on the MBD series; the PMBD75 uses a weighted plastic base
Modular — run several diffusers from one regulated supply through a distribution manifold with a flowmeter on each line
Suits pure oxygen supplementation and CO2 dosing at a bubbling pressure of 25–35 psi (1.7–2.4 bar)
Sizing — divide the gas flow your tank needs by the recommended per-diffuser flow rate in the table below to get the number of diffusers.

Specifications

Model	Overall size	Recommended gas flow	Max flow at 3.5 bar	Weight	Gas connection
PMBD75	220 × 70 mm	up to 0.75 LPM	2.2 LPM	0.45 kg	6 mm (1/4″) hose barb
MBD100	370 × 45 mm	up to 1.5 LPM	4.5 LPM	0.54 kg	6 mm (1/4″) hose barb
MBD300	390 × 83 mm	up to 3 LPM	9 LPM	1.3 kg	1/4″ NPT female
MBD600	700 × 83 mm	up to 6 LPM	18 LPM	2.3 kg	1/4″ NPT female
MBD900	1020 × 83 mm	up to 9 LPM	27 LPM	3.3 kg	1/4″ NPT female
MBD1200	1320 × 83 mm	up to 12 LPM	36 LPM	4.3 kg	1/4″ NPT female

Downloads

Spec Sheet

Frequently Asked Questions

How do I choose the right MBD size?

What oxygen flow does each model take?

What supply pressure do they need?

How efficient are they?

What are they made from?

What gas connection do they use?

How do I maintain them?

Spare Parts & Consumables

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Point Four Microbubble Oxygen Diffuser (MBD)

Product Information

Key Features

Specifications

Downloads

Frequently Asked Questions

Spare Parts & Consumables

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