Chihiros External CO₂ Diffuser

Bring professional-grade gas diffusion to your planted aquarium without sacrificing the clean lines of your scape. The Chihiros External CO₂ Diffuser mounts inline on your canister filter’s return hose, hiding the hardware in your cabinet while delivering a micro-mist of CO₂ directly into the out-flow.

Key Features

• Crystal-clear view, zero clutter – No more glass diffusers or bubble counters inside the tank; all you see is plants.
• Engineered for efficiency – A precision-fired ceramic membrane atomises CO₂ into ultra-fine bubbles. The longer dwell time in the hose means more gas dissolves before reaching the display, reducing wastage.
• Built to last – The anodised aluminium shell shrugs off high pressure and humidity, while the acrylic window lets you monitor bubble density at a glance.
• Service-friendly – Twist off the front cap, swap the ceramic disk, and you’re back in action in minutes.
• Fits your setup – Choose the size that matches your filter hose and flow rate. All models accept standard 4/6 mm CO₂ tubing via the included compression fitting.

Model guide

Specifications

• Material: Aluminium alloy, acrylic, sintered-ceramic membrane
• Minimum working pressure: 0.15 MPa / 1.5 bar
• Membrane diameter: 17 mm (M), 21 mm (L), 25 mm (XL)
• Replaceable diffuser head: Yes (spares sold separately)
• Includes: Inline diffuser body, membrane pre-installed, hose nuts, O-rings, user guide