Inline connection to canister filter return line ensures direct CO2 diffusion and minimal pressure loss
High-efficiency ceramic membrane creates ultra-fine CO2 mist for maximum dissolution
Invisible installation keeps aquarium clean without in-tank equipment
Durable acrylic body with replaceable ceramic disc for long-term use
Universal compatibility with most CO2 systems and canister filters
Summarized by Shop
The Inline CO2 Diffuser (19mm & 25mm) is a professional-grade CO2 diffusion system designed specifically for large canister filters like the Fluval FX series. This inline diffuser provides superior CO2 dissolution directly into your filter's output line, ensuring maximum efficiency and even distribution throughout your planted aquariu
Available sizes
19 mm (fits 16-19 mm outer diameter hoses), 25 mm (fits 22-25 mm outer diameter hoses)
Material
Acrylic body, ceramic diffusion disc, metal fittings
Compatible with
Fluval FX4, FX5, FX6, and other large canister filters
Installation
Cut return line and insert diffuser; silicone adapter required for factory tubing