Glass Beetle Diffuser – 30 mm
The 30 mm Seachem Beetle Diffuser is a highly effective way to disperse CO2 throughout your aquatic system. The pollen-style diffuser is compatible with 6 mm (1/4″) standard airline tubing and connects directly to CO2 injection systems. The unit boasts a 30 mm large surface area disc that provides diffusion for large volumes of CO2 gases, helping to provide mid-sized and higher growth aquaria with the CO2 that they need to remain healthy and functional. Suction cups included with the unit. Suitable for aquariums between 20-50 gallons.
| Specification | Detail |
|---|---|
| Diffuser Type | 30 mm Glass Beetle |
| Connection Size | 6 mm (1/4″) airline tubing |
| Surface Area | 30 mm disc |
| Compatible Aquarium Size | 20 to 50 gallons |
| Includes | Suction cups |
FAQ
What is the maximum aquarium size this diffuser is suitable for?
The diffuser is suitable for aquariums between 20 and 50 gallons.
Can this diffuser be used with standard airline tubing?
Yes, it is compatible with 6 mm (1/4″) standard airline tubing.
Does the diffuser come with suction cups?
Yes, suction cups are included with the unit.

Simon Vance –
The diffuser works well in my 35-gallon tank. CO2 distribution is even and plants grow steadily. Easy to install with the included suction cups. No leaks after a week of use.
James Ball –
Good for mid-sized tanks. The 30 mm disc provides consistent CO2 diffusion. Suction cups hold firmly on glass. A reliable addition to my planted aquarium.
Leonard Hudson –
I’ve used this with a standard CO2 regulator. The gas spreads evenly and my stem plants are thriving. No clogging or performance issues after several months.