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U4 Filter

Fluval Compatible U4 Foam Pad (6pk)

$13.88

Fluval Compatible U4 Foam Pad (6pk) Foam Pads capture large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process.  The foam pad has a pore size that allows efficient water flow, less clogging...

Fluval Compatible U4 Polyester Pad (6pk)

$13.88

Fluval Compatible U4 Polyester Pad (6pk) The polyester filter pad side filters out fine debris and contaminants. For freshwater, marine or reptile environments. For crystal clear water Replace every 6-8 weeks Easy to replace Works in freshwater,...

Fluval U BioMax 110gm

$13.95 $11.88

Fluval U BioMax 110gm For Fluval® U Series Underwater Filter models U2, U3, U4 Fluval® BIOMAX provides an optimal environment for the colonization and growth of beneficial bacteria. The unique bio rings have a complex pore system that provides...

Fluval U4 - Foam Insert (2pk)

$9.95 $8.88

Fluval U4 - Foam Insert The Fluval® Foam Pad captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom-sized, it fits perfectly inside the filter chamber to prevent debris...

Fluval U4 Compatible Carbon Foam Pad (6pk)

$15.88

Fluval U4 Compatible Carbon Foam Pad (6pk) Custom-sized, It effectively filters out extremely fine suspended particles and contaminants. Suitable for freshwater, marine or reptile environments. Remove waste particles Helps bological...

Fluval U4 Internal Filter

$189.95 $159.00

Fluval U4 Internal Filter Offering outstanding 3-stage filtration, increased water movement and vital aeration, Fluval U-Series internal filters are the perfect solution where external filtration is not possible. Now with new and improved design...