Fluval underwater filters with three stage filtration are ideal for use in fresh, marine or reptile environments. Stage 1 foam removes large particles. Stage 2 poly/carbon cartridge traps fine debris, improves water clarity and removes impurities. Stage 3 BIOMAX provides optimal biological filtration efficiency. For aquariums, terrariums and turtle tanks Ideal supplemental or stand-alone filter, or for installations where external filtration is not possible

• New Sleek Design
• New Easy Grip Water Control Paddle
• New Redesigned Media Cartridge – Traps more debris
• Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums
• Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature
• Position vertically against aquarium wall to create currents or customized flow patterns
• Convenient flip-top lid allows for quick and easy access to filter cartridge for maintenance or replacement
• Made in Italy

Ideal for freshwater, saltwater and reptile environments

Available in the following models:

Fluval U1 

• Includes adjustable flow control and comes complete with 1 foam pad
• Suitable for aquariums up to 55 L (15 US gal)
• Output :250 L(65 US gal.)

Fluval U2

• Adjustable 3-way flow control – Top Output for circulation and oxygenation, Integrated Spray Bar for a gentle even flow, and Bottom Output for deepwater agitation
• Comes with 2 Foam Pads, 2 Poly/Carbon Cartridges, and BioMax Biological Rings
• Suitable for aquariums from 45 to 110 L (12 to 30 US gal)
• Output :400 L(105 US gal.)

Fluval U3

• Adjustable 3-way flow control – Top Output for circulation and oxygenation, Integrated Spray Bar for a gentle even flow, and Bottom Output for deepwater agitation
• Comes with 2 Foam Pads, 2 Poly/Carbon Cartridges, and BioMax Biological Rings
• Suitable for aquariums from 90 to 150 L (24 to 40 US gal)
• Output :600 L(155 US gal.)

Fluval U4

• Adjustable 3-way flow control – Top Output for circulation and oxygenation, Integrated Spray Bar for a gentle even flow, and Bottom Output for deepwater agitation
• Comes with 2 Foam Pads, 2 Poly/Carbon Cartridges, and BioMax Biological Rings
• Suitable for aquariums from 130 to 240 L (36 to 65 US gal)

• Output :1000 L(260 US gal.)

Fluval Nano Aquarium Filter is an optimal water filtration system for small aquariums up to 55 litres (15 US gal). 

Equipped with foam filter media, it provides effective and thorough mechanical and biological filtration. A fine foam pad traps small debris and a Bio-Foam captures debris and houses nitrifying bacteria. The filter also provides the option of adding a carbon cartridge (sold separately) for additional chemical filtering.

The Nano Filter has an adjustable flow output with an attachable spray bar that distributes a gentle, even flow of water, making it safe for delicate fish or shrimp.

• Foam media provides both mechanical and biological filtration
• Fine foam pad traps debris, while Bio-Foam provides ideal surface for growth of beneficial nitrifying bacteria
• Carbon cartridge offers additional filtering option to remove odors and impurities (Replacement Carbon Cartridge)
• Adjustable flow output with attachable 360 swivel spray bar distributes a gentle and even water flow – safe for delicate fish or shrimp
• Quickly assembles/disassembles for easy installation and maintenance
• 3 suction cups offer secure in-tank attachment
• Great for small fish, betta, and shrimp