Fluval Replacement Diffuser Part for BIO-CO2 Pro 500L Aquarium Diffuser
The Fluval CO2 Diffuser (for 500 L system) is a replacement ceramic diffuser designed for the Bio-CO2 Pro (up to 132 gallon) kit. It produces an ultra-fine mist of carbon dioxide bubbles, maximizing CO2 dissolution into the aquarium water for efficient uptake by plants. Made of clear, durable acrylic with a high-quality porous disc, this diffuser ensures reliable, even CO2 distribution while remaining unobtrusive in the tank.
Product Specifications
| Feature | Detail |
|---|---|
| Compatibility | Bio-CO2 Pro (up to 132 gallon) |
| System Size | 500 L |
| Material | Clear acrylic with ceramic porous disc |
| Function | Produces ultra-fine CO2 mist for efficient plant uptake |
FAQ
Is this diffuser compatible with all Bio-CO2 Pro models?
Yes, this diffuser is specifically designed for the Bio-CO2 Pro system up to 132 gallons.
Does this diffuser require any special installation?
No, it fits directly into the CO2 system as a replacement part and requires no additional tools or adjustments.
Can this diffuser be used with other aquarium systems?
Please contact customer service

Julian Scott –
The diffuser works smoothly with my 500L tank and provides consistent CO2 mist. The acrylic is clear and the ceramic disc holds up well after several months of use. My plants have shown better growth since switching to this part.
Elizabeth Murray –
Easy to install as a replacement. The mist is fine and evenly distributed, which helps my aquatic plants absorb CO2 more efficiently. No leaks or clogging issues so far.
Victoria Knox –
I replaced the original diffuser after a few months and noticed a noticeable improvement in plant health. The material feels durable and the performance is stable over time.