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B&Q£5.99Visit shop B&Q - 4 X Compatible Fluval U2 Polymax Filter Cartridges
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The Finest-Filters PolyMax Cartridges are designed for aquarium hobbyists using the Fluval U2 internal filter who want to simplify water quality management. These cartridges excel at removing phosphates, nitrites, and nitrates to control algae and clear water, though they require a strict 4-week replacement schedule to remain effective. By combining mechanical and chemical filtration, this 4-pack provides a convenient solution for maintaining a cleaner, odor-free aquarium environment with less manual intervention.
| Brand | Finest-Filters |
|---|
For optimal filtration performance, replace the cartridges every 4 weeks.
No, these are designed as disposable media. Once the adsorption capacity for phosphates and nitrates is reached, they cannot be 'recharged' by washing.
Yes, they are inert and safe for all freshwater fish and aquatic plant species when used as directed.
These cartridges focus on chemical filtration. As long as you maintain your biological sponge media, your beneficial bacteria colony will remain intact.
Yes, chemical adsorption media can pull medication from the water column. Remove the cartridge during medical treatment and replace it once the treatment is finished.
Check the intake sponge for organic buildup and rinse it in a bucket of tank water; if flow is still low, the cartridge may be clogged with fine particulate and needs replacement.
Ensure the aquarium is not receiving direct sunlight and that feeding amounts are not excessive; the cartridge targets chemical imbalances, but cannot stop external light sources.
To install, power off your Fluval U2 filter and remove the cover. Carefully slide out the old filter cartridge and discard it, ensuring any loose debris does not fall back into the tank. Slide the new Finest-Filters PolyMax cartridge into the designated slot, ensuring a snug fit. Replace the filter lid and power the unit back on.
Compatibility is strictly limited to the Fluval U2 internal filter model. Do not attempt to force these cartridges into smaller or larger Fluval filter variants. For care, avoid rinsing the chemical media under tap water, as this can degrade the adsorption capacity of the material. Simply keep the intake sponge clean to ensure maximum water volume passes through the PolyMax insert.
