Seachem Glass Inline Diffuser 17 mm
The 17 mm glass Inline Diffuser is a pollen style inline CO2 diffuser that is placed in the outflow line of the filter or aquarium pump to efficiently diffuse CO2 gas into the aquarium. This placement of the diffuser avoids the need for a diffuser in the aquarium and significantly reduces the visibility of the CO2 injection system in the aquascape. This also allows for more rapid diffusion of CO2 into the system and can allow for more consistent levels and reduce waste of CO2 or overdose of CO2.
Compatible with 16 mm ID/22 mm OD hoses. Compatible with 6 mm (1/4″) – Standard Airline Tubing. Suction cups included.
| Specification | Details |
|---|---|
| Diffuser Type | Inline, Glass, Pollen Style |
| Size | 17 mm |
| Compatible Hose ID | 16 mm ID / 22 mm OD |
| Compatible Tubing | 6 mm (1/4″) Standard Airline Tubing |
| Includes | Suction cups |
| Usage | Place in outflow line of filter or pump |
FAQ
Can this diffuser be used with any aquarium pump?
Yes, it is compatible with any aquarium pump that has an outflow line with a 16 mm ID or 22 mm OD hose.
Is the diffuser easy to install?
Yes, it comes with suction cups and fits securely into the outflow line of the filter or pump.
Does this diffuser require special maintenance?
Rinse the glass diffuser with warm water periodically to keep it clean and free of debris.

Joshua Roberts –
The diffuser works smoothly with my filter setup. I noticed a more even CO2 distribution and less visible tubing in the tank. Easy to install and the suction cups hold well. No issues so far.
Kylie Forsyth –
I used it with my standard airline tubing and it fits perfectly. The glass is clean and the CO2 diffusion feels more consistent than before. Slight improvement in plant growth.
Warren Mitchell –
Great product for a clean, unobtrusive CO2 system. Fits my 12m hose and works well with my pump. The suction cups stay in place even during water changes.
David Jones –
It’s simple to install and the CO2 output is steady. I didn’t notice any leaks or bubbles, which is a relief. Works well with my existing setup.