Fluval Underwater Filter BioMax – 170 g (6 oz)
Fluval BioMax provides an optimal environment for the colonization and growth of beneficial bacteria. The unique bio rings have a complex pore system that provides an optimal environment where beneficial bacteria can thrive. Fluval BioMax also reduces and controls ammonia and nitrate.
Key Features
- Provides an optimal environment for the colonization and growth of beneficial bacteria
- Unique bio rings have a complex pore system that provides an optimal environment where beneficial bacteria can thrive
- Also reduces and controls ammonia and nitrate
- Perfect for freshwater and marine environments
- Designed for Fluval U2, U3, U4 Underwater Filters
- 170 grams (6 oz)
| Feature | Description |
|---|---|
| Weight | 170 g (6 oz) |
| Compatibility | Fluval U2, U3, U4 Underwater Filters |
| Environment | Freshwater and marine |
| Function | Supports beneficial bacteria growth, reduces ammonia and nitrate |
FAQ
How does the BioMax filter support beneficial bacteria growth?
The unique bio rings have a complex pore system that provides an ideal environment for beneficial bacteria to colonize and grow, helping maintain water quality.
Is the BioMax filter compatible with all Fluval underwater filters?
No, it is specifically designed for Fluval U2, U3, and U4 underwater filters.
Does the BioMax filter help control ammonia and nitrate levels?
Yes, it helps reduce and control ammonia and nitrate levels by supporting the growth of beneficial bacteria that break down these compounds.

Piers Ogden –
I’ve used the BioMax filter with my Fluval U4 for three months now. The water clarity has improved significantly, and I notice less ammonia buildup. The bio rings are easy to clean and stay effective over time. Works well in both freshwater and marine tanks.
Jacob Blake –
The filter fits perfectly into my U3 unit. I appreciate the stable bacteria growth it supports. Nitrate levels have dropped noticeably after a few weeks. Slight adjustment needed when installing, but otherwise straightforward.
Elizabeth Morgan –
Great product for maintaining a healthy tank environment. The bio rings are durable and the bacteria colonies develop quickly. I’ve seen a clear improvement in water quality since switching to BioMax.