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💧 Keep your aquatic world flawlessly fresh — because your tank deserves the best!
The Fluval U3 Underwater Filter Poly/Carbon insert is a precision-engineered replacement filter designed exclusively for the Fluval U3 system. It delivers superior chemical filtration suitable for freshwater, marine, and reptile tanks, ensuring clean, healthy water. Compact and lightweight, it offers easy installation and maintenance, backed by a strong reputation among aquarium enthusiasts.




























| ASIN | B001XRR3E0 |
| ASIN | B001XRR3E0 |
| Allergen Information | Nut Free |
| Best Sellers Rank | #24,666 in Pet Supplies ( See Top 100 in Pet Supplies ) #236 in Aquarium Filter Accessories |
| Brand Name | Fluval |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,302) |
| Date First Available | September 7, 2010 |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00015561104913 |
| Included Components | Fluval U3 Underwater Filter Poly/Carbon |
| Is Discontinued By Manufacturer | No |
| Item Form | Cartridge |
| Item Type Name | Fluval U3 Underwater Filter Poly/Carbon |
| Item Weight | 0.03 Kilograms |
| Item model number | A491 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer Part Number | A491 |
| Model Number | A491 |
| Pet Type | Amphibian, Fish, Reptile |
| Product Dimensions | 2.5 x 2.5 x 1.3 inches; 0.92 ounces |
| Target Species | Fish |
| UPC | 015561104913 |
| Unit Count | 1 Count |
| Warranty Description | Warranty |
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