FLUVAL FX4/FX6 Bio Foam (2 Pieces / Pack) (A239)
Designed specifically for Fluval FX4 and FX6 canister filters, Bio-Foam performs double duty as both an effective mechanical and biological media.
- Mechanical/Biological filter media
- Dense structure ideal for trapping small particles
- Intricate, porous network provides vast surface area to facilitate growth of beneficial bacteria
- Helps create clean and healthy water conditions
- For use in freshwater and saltwater aquariums
- Convenient 2-pack format
- Specially designed foam pads for FX4, FX5 and FX6 high performance canister filters
| Product Details |
|---|
| Brand: FLUVAL |
| Model: FX4/FX6 Bio Foam (A239) |
| Quantity: 2 pieces |
| Compatible Filters: FX4, FX5, FX6 |
| Water Type: Freshwater, Saltwater |
FAQ
Can this product be used in both freshwater and saltwater aquariums?
Yes, the Bio Foam is suitable for use in both freshwater and saltwater aquariums.
Is the foam compatible with Fluval FX4, FX5, and FX6 filters?
Yes, the foam pads are specifically designed for Fluval FX4, FX5, and FX6 high performance canister filters.
Does the Bio Foam provide both mechanical and biological filtration?
Yes, it serves as both mechanical media for trapping particles and biological media for supporting beneficial bacteria growth.

Bernadette Dickens –
Installed the Bio Foam in my FX6 filter and noticed a significant improvement in water clarity within a week. The filter handles debris well and the water stays cleaner longer. Works great in both freshwater and saltwater setups.
Dylan Russell –
The foam fits perfectly in my FX4 filter. It’s easy to install and the porous structure helps maintain stable water conditions. I’ve seen fewer algae blooms since adding it.
Alexander Watson –
After switching from old filter media, the Bio Foam has made a noticeable difference in water quality. It’s durable, fits well, and supports bacterial growth effectively in my saltwater tank.