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.)