Fluval U4 Foam Insert 2 Pack

Fluval U4 Foam Insert 2 Pack — Replacement mechanical filter pads for the Fluval U4 Internal Filter

The Fluval U4 Foam Insert 2 Pack (SKU: PF134a) provides two replacement mechanical filter pads tailored specifically for the Fluval U4 Internal Filter. Constructed with a dense internal pore structure, these foam pads capture large particulates, fish waste, and suspended organic matter before water moves into the chemical and biological chambers.

Maintaining clean foam pads ensures unrestricted flow through the U4 filter, preventing motor strain and creating a supportive environment for beneficial bacterial colonisation.

Usage & Application

When to Use

• Periodic Media Maintenance: Replace worn or clogged foam pads every 3 to 6 months.

• Flow Restorations: Use when accumulated debris restricts output performance through the filter nozzles.

How to Use

1. Disconnect power to the U4 filter and open the top flip lid.

2. Slide out the side cartridge doors and discard the old foam inserts.

3. Rinse the new foam pads in aquarium water to clear loose fibres.

4. Fit the new pads into the side doors and snap the media frames back into the U4 body.

Product Specifications & Highlights

Key Features

• Custom Fit for Fluval U4: Pre-sized specifically for the dual outer mechanical slots of the U4 filter.

• High-Capacity Mechanical Trapping: Strains suspended waste, organic detritus, and floating particles.

• Supports Bio-Filtering: Complex porous matrix fosters nitrifying bacterial growth.

• Package of 2 Pads: Full replacement set for both media doors.

Product Details

• Brand: Fluval

• SKU: PF134a

• Barcode (GTIN/UPC): 0015561104883

• Product Type: Filter Media / Foam Inserts

• Package Dimensions: 68 mm (L) × 285 mm (W) × 35 mm (H)

• Gross Package Weight: 40 g

• Target Environment: Freshwater & Marine Aquariums using Fluval U4 Filters