Glass Beetle Diffuser – 27 mm
The 27 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 27 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 | 27 mm Glass Beetle |
| Tube Compatibility | 6 mm (1/4″) standard airline tubing |
| Surface Area | 27 mm disc |
| Recommended Tank Size | 20 to 50 gallons |
| Includes | Suction cups |
FAQ
What is the maximum tank 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.

Luke Rees –
The diffuser works well in my 30-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.
Alexandra Miller –
Good for mid-sized tanks. The 27 mm surface area helps with consistent CO2 release. Suction cups hold well on the glass. A bit harder to position than expected, but works fine.
Liam Sutherland –
Used in a 45-gallon planted tank. Plants show better color and growth since adding this diffuser. Diffusion is smooth and steady. No clogging issues after several months.