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B&Q£8.99Visit shop B&Q - 4 X Fluval U2 Compatible Plain Foam And 4 X Compatible Polymax Filter Cartridges
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Designed for aquarium enthusiasts using the Fluval U2 internal filter, this 8-pack replacement set from Finest-Filters offers a practical solution for maintaining crystal-clear water and a healthy environment for fish and plants. By combining high-density foam for mechanical filtration with PolyMax cartridges for chemical adsorption of phosphate, nitrite, and nitrate, this kit helps minimize green water and algae growth. Users should note that these cartridges are consumable components requiring regular replacement every four weeks to maintain consistent water quality.
| Brand | Finest-Filters |
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No, the PolyMax cartridges rely on adsorption and must be replaced every 4 weeks to remain effective.
These are Finest-Filters compatible replacements engineered to meet the dimensions and filtration requirements of the Fluval U2.
The chemical media can become saturated and may eventually stop absorbing pollutants, potentially releasing them back into the water.
It is good practice to give the foam a quick rinse in aquarium water to remove any manufacturing dust, though it is not strictly required.
No, these are sized specifically for the U2 model (127 x 57 x 13 mm) and will not provide a proper fit for the larger U3 or U4 filter housings.
The foam sponges may be heavily clogged with debris. Rinse the foams in tank water or replace them if they are too worn.
Check your lighting duration and ensure you are not overfeeding, as PolyMax cartridges address chemical balance but cannot overcome excessive organic loading.
These filter media replacements are compatible with the Fluval U2 internal filter. Installation is straightforward: open the filter housing, remove the spent foam and cartridge, and slide the new components into their designated slots.
Care Instructions:
