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B&Q£13.99Visit shop B&Q - 12 X Compatible Fluval U4 Polymax Filter Cartridges
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This guide is for aquarium owners using Fluval U4 internal filters who want to maintain clear water and healthy conditions for their fish and plants. These compatible PolyMax / ClearMax filter cartridges offer a cost-effective solution for removing phosphates, nitrites, and nitrates, significantly reducing algae growth and odors. A key caveat is that they are replacement cartridges and require a Fluval U4 filter unit to function. Key features include efficient phosphate, nitrite, and nitrate absorption, algae control, odor reduction, and suitability for the Fluval U4 filter series.
| Brand | Finest-Filters |
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For optimal performance, it is recommended to replace these filter cartridges approximately every 4 weeks.
No, these cartridges are specifically designed for the Fluval U4 series internal aquarium filters only.
This indicates that the cartridge is designed to function similarly to and replace the original PolyMax or ClearMax cartridges that would typically be used with the Fluval U4 filter, offering comparable media and performance.
No, these cartridges are designed for single use. The adsorptive media becomes exhausted over time and cannot be effectively cleaned for reuse.
They are designed to adsorb and trap phosphates, nitrites, and nitrates, which are common causes of algae growth and poor water quality.
These cartridges primarily focus on chemical filtration by adsorbing dissolved impurities. They do not provide significant biological filtration for beneficial bacteria. For a complete filtration setup, ensure your Fluval U4 also has appropriate media for biological filtration.
The dimensions of each cartridge are approximately 235 x 62 x 16 mm.
Ensure the cartridge is correctly seated and not blocking the water flow path. Check for any debris around the filter intake or outlet.
Verify that the cartridge is compatible with the Fluval U4 model and has been rinsed before insertion. Ensure the filter is running continuously. Some improvement may take longer depending on the severity of the water quality issue.
This may indicate the filter needs cleaning or that the cartridge is becoming saturated. Replace the cartridge if it has been in use for over 4 weeks or if performance has degraded.
Compatibility: These filter cartridges are specifically designed for the Fluval U4 series internal aquarium filters. Ensure your filter model matches this specification before use.
Setup:
Care:
