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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 | #24,652 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 |
J**T
Love fluval!
Love these filters they keep my turtle aquarium as clean as can be until I have to purchase more! Love fluval products!!
T**B
Turtle filter
Filter works well for smaller turtle tanks.
A**R
excellent
great replacement
R**C
Nice
Good product.
C**M
Aquarium Filters
My favorite brand of filter replacements for my aquarium filters. Reliable product at a good price.
K**P
Good for fish tank
Use it for fish tank
A**.
Great product and price
I've used these filters for years on my aquarium. I used to pay so much more when I bought them at the pet store. Now I can't even find them in the pet store. So glad I found a reasonably priced source.
P**R
Works well
For my 30 gallon tank this filter and accessories is great. Works well
M**Z
muy buen material de policarbonato para usar en el compartimento del policarbonato junto con una esponja para la filtración quimica y mecánica que lleva este excelente canister interno fluval u3 , que es muy facil de limpiar, mis peces disco estan felices y muy agradecidos
M**.
Bestellt, zügig bekommen. Ersatz, wenn vorhandene Filterpads ihren Dienst versagen. Guter Fluval U3 Filter der nunmal diese Filtereinsätze benötigt. Der Preis ist allerdings heftig für die Filtereinsätze. Da sollte man/frau auch mal Rabatt bekommen bei mehrabnahme, meine Meinung
S**S
it was a genuine part for the U3 fish filter, works well and good price
T**S
Dura muchísimo y es de calidad
F**.
Filtro originale fluval . Soddisfatto. Confezione originale arrivata in perfette condizioni.
Trustpilot
1 month ago
3 days ago