Fluval U4 Underwater Filter - Up to 65 gal.

Fluval U4 Underwater Filter - Up to 65 gal.

Bring powerful 3-stage filtration and circulation to hard-to-filter places like aquariums; terrariums and turtle tanks with the Fluval U Series Underwater Filter. This completely submersible filter features a unique 3-way flow control spray bar that... more

$69.99

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Fluval U4 Underwater Filter

Fluval U4 Underwater Filter

Fluval U4 Underwater Filter, by Fluval SEA more

$78.98

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Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

Create the ideal aquatic herptile habitat with superior filtration, water movement and aeration. The versatile Fluval U Series Underwater Filter offers creative new possibilities in aquatic and semi-aquatic herptile habitats. This fully submersible... more

$3.99 $3.19

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(275,000+)
Fluval U Series Underwater Filter Fluval U4

Fluval U Series Underwater Filter Fluval U4

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... more

$69.99

FREE shipping

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(275,000+)
Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

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... more

$3.99 $3.19

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(275,000+)
Fluval Motor Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Motor Replacement for Fluval U4 Underwater Aquarium Filter

This motor is suitable for Fluval U4 underwater filter. This product weighs 1.03-pound. Measures 9-inch length by 3-inch height by 7-inch width. more

$44.99

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Fluval Biomax Cartridge Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Biomax Cartridge Replacement for Fluval U4 Underwater Aquarium Filter

This biomax cartridge is suitable for Fluval U4 underwater filter. This product weighs 0.12-pound. Measures 1-1/3-inch length by 9-inch height by 2-inch width. more

$11.99

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Fluval U4 Poly & Carbon Cartridge

Fluval U4 Poly & Carbon Cartridge

Replacement Poly and Carbon Filter Cartridge for Fluval U4 Underwater Filter. more

$7.99

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Fluval Impeller Shaft Assembly Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Impeller Shaft Assembly Replacement for Fluval U4 Underwater Aquarium Filter

This impeller shaft assembly is suitable for U4 underwater aquarium filter. This product weighs 0.036-pound. Measures -1/2-inch length by 6-5/7-inch height by 3-8/9-inch width. more

$17.99

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Fluval U4 Foam Pad

Fluval U4 Foam Pad

Fluval Filter Foam Pads provide mechanical filtration by removing waste and debris from your aquarium water. Designed to fit the Fluval U4 Underwater Filter . For more information on mechanical filtration; please read our article on Aquarium Filter... more

$4.99

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Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges U4 Underwater Filter Cartridge - 2 Pack

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges U4 Underwater Filter Cartridge - 2 Pack

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges U4 Underwater Filter Cartridge - 2 Pack more

$12.87

FREE shipping

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Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges U4 BULK - 12 Cartridges - (6 x 2 Pack)

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges U4 BULK - 12 Cartridges - (6 x 2 Pack)

Fluval U Series Filter Poly / Carbon Cartridges have two sides for the most effective filtration. The U Series Cartridges is a polyester filter pad which filters out fine debris and contaminants and a carbon side which filters out harmful liquid... more

$43.33

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Fluval U2/U3/U4 Biomax Underwater Filter

Fluval U2/U3/U4 Biomax Underwater Filter

This Fluval U2/U3/U4 Biomax Underwater Filter lets you optimize your aquarium's biological balance.Add this Fluval U2/U3/U4 Biomax Underwater Filter to your aquarium for optimum biological balance. The U-series stage 3 filter helps maintain a healthy... more

$7.79

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(375,000+)
Fluval Motor Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Motor Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Motor Replacement for Fluval U4 Underwater Aquarium Filter This motor is suitable for Fluval U4 underwater filter. This product weighs 1.03-pound. Measures 9-inch length by 3-inch height by 7-inch width. more

$36.99

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Fluval Underwater Filter

Fluval Underwater Filter

Fluval U4 Underwater Filter The Fluval U4 Underwater Filter provides 3 stage filtration: Stage 1 foam removes large particles. Stage 2 poly/carbon cartridge traps fine debris, improves water clarity and removes impurities. Stage 3 Biomax provides... more

$92.99

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Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U4 Underwater Filter Cartridge

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U4 Underwater Filter Cartridge

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U4 Underwater Filter Cartridge - 2 Pack #A492 Fluval U Series Filter Poly / Carbon Cartridges have two sides for the most effective filtration. The U Series Cartridges is a polyester... more

$5.20

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Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U4 BULK - 12 Cartridges - (6 x

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U4 BULK - 12 Cartridges - (6 x

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U4 BULK - 12 Cartridges - (6 x 2 Pack) #0492M Fluval U Series Filter Poly / Carbon Cartridges have two sides for the most effective filtration. The U Series Cartridges is a polyester... more

$29.50

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Fluval U4 Underwater Aquarium Filter System

Fluval U4 Underwater Aquarium Filter System

$74.98

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Fluval "U" Internal Aquarium Filters Fluval U4

Fluval "U" Internal Aquarium Filters Fluval U4

The Fluval "U" Internal Filters are ideal for use as a permanent filter system, for supplemental filtration, or as a "quick-filter" to polish water. The U1 offers single stage filtration, while the U2/U3/U4 each offer three stage filtration to ensure... more

$79.99

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Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U2 Underwater Filter Cartridge

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U2 Underwater Filter Cartridge

Hagen Fluval Fluval Underwater Filter Stage 2 Poly/Carbon Cartridges: U2 Underwater Filter Cartridge - 2 Pack #A490 Fluval U Series Filter Poly / Carbon Cartridges have two sides for the most effective filtration. The U Series Cartridges is a polyester... more

$3.68

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Fluval Motor Replacement for Fluval U3 Underwater Aquarium Filter

Fluval Motor Replacement for Fluval U3 Underwater Aquarium Filter

Fluval Motor Replacement for Fluval U3 Underwater Aquarium Filter This motor is suitable for U3 underwater aquarium filter. This product weighs 0.67-pound. Measures 9-inch length by 3-1/2-inch height by 7-inch width. more

$32.99

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Fluval U Internal Filter Replacement Media U2/U3/U4 Bio Max

Fluval U Internal Filter Replacement Media U2/U3/U4 Bio Max

Foam pads trap large particles, the Poly/Carbon pads filter out fine debris and provide chemical filtration , and the BioMax bio rings create an optimal environment where beneficial bacteria can thrive. more

$4.99

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Fluval U4 Filter Foam Pad (2 pack)

Fluval U4 Filter Foam Pad (2 pack)

Fluval Foam pads capture large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for... more

$7.99 $5.79

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Fluval U4 Filter Foam Pad (2 pack)

Fluval U4 Filter Foam Pad (2 pack)

$6.09

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Fluval U4 Filter Poly/Carbon Catridge (2 pack)

Fluval U4 Filter Poly/Carbon Catridge (2 pack)

Fluval Poly/Carbon Cartridges features two sides for effective chemical filtration, the crucial second stage in the filtration process. The polyester filter pad side filters out fine debris and contaminants. The Carbon side filters out harmful liquid... more

$11.99 $8.99

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Fluval U4 Filter Poly/Carbon Catridge (2 pack)

Fluval U4 Filter Poly/Carbon Catridge (2 pack)

$9.49

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Fluval U2 Poly Carbon Underwater Filter Cartridge (2 Pack)

Fluval U2 Poly Carbon Underwater Filter Cartridge (2 Pack)

$2.55

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Fluval U1 Underwater Aquarium Filter System

Fluval U1 Underwater Aquarium Filter System

$29.99

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Fluval U2 Underwater Filter (105 gph)

Fluval U2 Underwater Filter (105 gph)

$52.49

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Fluval "U" Internal Aquarium Filters Fluval U2

Fluval "U" Internal Aquarium Filters Fluval U2

The Fluval "U" Internal Filters are ideal for use as a permanent filter system, for supplemental filtration, or as a "quick-filter" to polish water. The U1 offers single stage filtration, while the U2/U3/U4 each offer three stage filtration to ensure... more

$44.99

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Fluval 2 "Plus" Water Polishing Pad (4 pack)

Fluval 2 "Plus" Water Polishing Pad (4 pack)

The Fluval 2 Plus Polyester Filter Pad has been specially developed as a fine filter medium for the Fluval 2 Plus Underwater Filter and is ideally suited to filtering out extremly fine suspended particles and contaminants. more

$9.99 $6.49

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Fluval U Series Underwater Filter U4 Poly/Carbon (2 pk)

Fluval U Series Underwater Filter U4 Poly/Carbon (2 pk)

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... more

$5.99 $4.79

go to store
(275,000+)
Fluval U Series Underwater Filter Fluval U4

Fluval U Series Underwater Filter Fluval U4

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... more

$69.99

FREE shipping

go to store
(275,000+)
Fluval U Series Underwater Filter U4 Poly/Carbon (2 pk)

Fluval U Series Underwater Filter U4 Poly/Carbon (2 pk)

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... more

$5.99

go to store
(275,000+)
Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

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... more

$3.99

go to store
(275,000+)
Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

Fluval U Series Underwater Filter U4 Foam Pad (2 pk)

Create the ideal aquatic herptile habitat with superior filtration, water movement and aeration. The versatile Fluval U Series Underwater Filter offers creative new possibilities in aquatic and semi-aquatic herptile habitats. This fully submersible... more

$3.99

go to store
(275,000+)
Fluval U Series Underwater Filter Fluval U4

Fluval U Series Underwater Filter Fluval U4

Create the ideal aquatic herptile habitat with superior filtration, water movement and aeration. The versatile Fluval U Series Underwater Filter offers creative new possibilities in aquatic and semi-aquatic herptile habitats. This fully submersible... more

$69.99

FREE shipping

go to store
(275,000+)
Fluval Body Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Body Replacement for Fluval U4 Underwater Aquarium Filter

This body is suitable for Fluval U4 underwater filters. This product weighs 0.63-pound. Measures 12-inch length by 3-1/2-inch height by 3-1/2-inch width. more

$34.50

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Fluval Foam Cartridge Frame Replacement for Fluval U4 Underwater Aquarium Filter

Fluval Foam Cartridge Frame Replacement for Fluval U4 Underwater Aquarium Filter

This foam cartridge frame is suitable for Fluval U4 underwater filters. This product weighs 0.084-pound. Measures 11-inch length by 1-inch height by 6-inch width. more

$17.62

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Fluval Underwater Filter Foam Pad U4 BULK - 12 Pads - (6 x 2 Pack)

Fluval Underwater Filter Foam Pad U4 BULK - 12 Pads - (6 x 2 Pack)

Captures large suspended particles and debris Replacement Stage 1 foam filtration pad Compatible with Fluval U-series filters more

$29.46

FREE shipping

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