The Ultum Nature Systems Pro Inline CO2 Diffuser provides clean, consistent CO2 diffusion while keeping equipment outside of the aquarium. Designed for use with canister filter outflow tubing, it’s a top pick for planted aquarium hobbyists who want efficient CO2 distribution and less equipment inside the tank.

Available in multiple sizes to fit common aquarium filter tubing, the UNS Pro Inline Diffuser features a side-mounted ceramic disc. This small detail reduces flow disruption and makes it easy to clean or replace when needed.

Product Highlights
- Reduces clutter and visible in-tank gear
- Fine CO2 diffusion and even distribution
- Side-mounted ceramic disc made from PC material is durable for long-term use and positioned for simple maintenance and replacement
- Available in three common sizes to accommodate a range of canister filter setups

Inline diffusers are designed for use with pressurized CO2 systems and external canister filters. Ceramic diffusers naturally accumulate buildup over time and may require periodic cleaning or replacement to maintain consistent diffusion performance. The image below depicts where to install it and how it works.

Compatibility Guide

Important Information:
- For use with pressurized CO2 planted aquarium systems
- Designed for inline installation with canister filter tubing
- Replacement ceramic disc available separately