Fluval U2 Clearmax Cartridge (2 x Pack)
Fluval Clearmax filter cartridge helps control green water and unsightly algae growth by adsorbing and trapping phosphate, nitrite and nitrate. It effectively produces crystal clear water, reduces odours.
Key Features
- Removes phosphate, nitrite, and nitrate to reduce algae growth
- Helps maintain clear and clean aquarium water
- Reduces unpleasant odours in the tank environment
Specifications
| Item | Details |
|---|---|
| Cartridge Type | Clearmax |
| Quantity | 2 x Pack |
| Compatible Filter | Fluval U2 |
| Material | Activated carbon and specialized filtration media |
FAQ
How often should I replace the Clearmax cartridge?
The cartridge should be replaced every 4 to 6 weeks depending on tank conditions and fish population.
Can this cartridge be used in other Fluval filter models?
This cartridge is specifically designed for the Fluval U2 filter and is not compatible with other models.
Does the cartridge remove all types of algae?
The cartridge helps reduce algae growth by removing nutrients like phosphate, but it does not eliminate all forms of algae.

Frank Rampling –
The Clearmax cartridge made a noticeable difference in my tank’s water clarity. After a few weeks, the green water issue disappeared and the smell became much milder. Easy to install and fits perfectly in the U2 filter.
Piers Ellison –
I’ve used this cartridge for about 5 weeks and the water looks much cleaner. Algae growth has reduced significantly, though I still need to monitor fish waste. The filter runs smoothly without clogging.
Paul Dickens –
Great product for maintaining clear water. I noticed fewer algae blooms and the tank smells fresher. The two-pack is sufficient for a medium-sized aquarium with 10 fish.