OB Guy
Administrator
Fluval U1, Fluval U2, Fluval U3 and Fluval U4 Series Underwater Fully Submergible Aquarium Filter Review:
The Fluval U4 filter and Fluval U series aquarium filters are one of the best if not the best fully submersible underwater aquarium filters on the market in my opinion. I have three Fluval U4 filters that I have used in many different aquariums form turtles tanks to Cichlid tanks. The Fluval U4 is very easy to clean and maintain and works great on it's own or as a secondary filter for your aquarium. The output on the Fluval U4 is very powerful and is also good for moving water on the surface. It's like having a powerhead with the added benefit of additional filtration. I have never used the Fluval U1,U2 or U3 but the design is the same on all the Fluval U series filters just different in size. I would highly recommend the Fluval U4 for anyone needing a submersible filter for their aquarium.
Overview:
Open your eyes to a world of unsurpassed underwater aquarium filtration. The versatile Fluval U Series Underwater Filter offers creative new possibilities for aquarium filtration, water movement and crucial aeration in freshwater and saltwater aquariums. Fully submersible filter suction mounts virtually anywhere inside your aquarium, making it the perfect solution for setups where external filtration is not possible. Place horizontally or vertically in your aquarium or even in sump-style filters for added filtration. Adjustable flow rate and directional output nozzle lets you direct water movement where you need it most. Venturi system introduces vital oxygen for a healthy aquarium environment. The top-loading Fluval U Series filter features flip-top media chamber access for fast, efficient maintenance. Quiet running units are easy to install and maintain as primary aquarium filtration or as the ideal supplemental filtration in larger systems with heavy fish loads. Also great for terrariums and turtle tanks.
U2, U3 and U4 feature adjustable 3-way flow to give you custom water movement in your aquarium. Choose top output for maximum circulation and oxygenation, spray bar output for gentle flow in planted aquariums, or bottom output for deepwater agitation.
The Fluval U4 filter and Fluval U series aquarium filters are one of the best if not the best fully submersible underwater aquarium filters on the market in my opinion. I have three Fluval U4 filters that I have used in many different aquariums form turtles tanks to Cichlid tanks. The Fluval U4 is very easy to clean and maintain and works great on it's own or as a secondary filter for your aquarium. The output on the Fluval U4 is very powerful and is also good for moving water on the surface. It's like having a powerhead with the added benefit of additional filtration. I have never used the Fluval U1,U2 or U3 but the design is the same on all the Fluval U series filters just different in size. I would highly recommend the Fluval U4 for anyone needing a submersible filter for their aquarium.
Overview:
* | Fully submersible aquarium filter for enhanced filtration options |
* | Boost aquarium filtration, water movement and crucial aeration |
* | Underwater filter features flip-top access for easy media change |
Open your eyes to a world of unsurpassed underwater aquarium filtration. The versatile Fluval U Series Underwater Filter offers creative new possibilities for aquarium filtration, water movement and crucial aeration in freshwater and saltwater aquariums. Fully submersible filter suction mounts virtually anywhere inside your aquarium, making it the perfect solution for setups where external filtration is not possible. Place horizontally or vertically in your aquarium or even in sump-style filters for added filtration. Adjustable flow rate and directional output nozzle lets you direct water movement where you need it most. Venturi system introduces vital oxygen for a healthy aquarium environment. The top-loading Fluval U Series filter features flip-top media chamber access for fast, efficient maintenance. Quiet running units are easy to install and maintain as primary aquarium filtration or as the ideal supplemental filtration in larger systems with heavy fish loads. Also great for terrariums and turtle tanks.
U2, U3 and U4 feature adjustable 3-way flow to give you custom water movement in your aquarium. Choose top output for maximum circulation and oxygenation, spray bar output for gentle flow in planted aquariums, or bottom output for deepwater agitation.
- U1 includes: 1 foam filter pad
- U2 includes: 2 foam filter pads, 2 poly/carbon cartridges, and 40 g BioMAX
- U3 includes: 2 foam filter pads, 2 poly-carbon cartridges and 40 g BioMAX
- U4 includes: 2 foam filter pads, 2 poly-carbon cartridges and 90 g BioMAX.
Model | Stage 1 Filter Foam Bio/Mechanical Filtration | Stage 2 Poly/Carbon Cartridge Chemical Filtration | Stage 3 BioMax Biological Filtration |
U2 | X | X | X |
U3 | X | X | X |
U4 | X | X | X |
Specifications |