Fluval U4 Complete Filter Media Kit Foam Carbon BioMax Aquarium Replacement

Fluval U4 Complete Filter Media Kit – Foam, Carbon & BioMax

Keep your aquarium water clean and clear with the Fluval U4 Complete Filter Media Cartridge Kit, a genuine replacement media set designed specifically for the Fluval U4 Internal Aquarium Filter.

This complete filtration media kit combines mechanical, chemical and biological filtration, helping remove debris, improve water clarity and support beneficial bacteria responsible for maintaining healthy aquarium water conditions.

Ideal for refreshing your existing Fluval U4 filter, this replacement set provides the essential filtration media needed to maintain effective aquarium filtration.

PLEASE NOTE: All filter media is brand new and unused but is supplied in generic packaging rather than the original Fluval retail packaging.

Key Features & Benefits

• Complete Fluval U4 Media Kit – Replacement filtration media for the Fluval U4 Internal Filter.
• Genuine Fluval Filter Media – Original filtration media designed for compatible Fluval equipment.
• 3-Stage Filtration – Supports mechanical, chemical and biological filtration.
• Mechanical Foam Filtration – Captures suspended dirt, fish waste and debris.
• Activated Carbon Media – Helps remove unwanted odours, dissolved impurities and discolouration.
• BioMax Biological Media – Provides a porous surface for beneficial nitrifying bacteria.
• Improves Water Clarity – Helps maintain cleaner aquarium water.
• Easy Filter Maintenance – Convenient replacement media for routine servicing.
• Designed for Fluval U4 – Suitable for the Fluval U4 Internal Aquarium Filter.
• Brand New & Unused – Fresh replacement media ready for installation.
• Generic Packaging – Supplied without original Fluval retail packaging.

Complete 3-Stage Aquarium Filtration

The Fluval U4 Internal Filter uses a combination of filtration media to help maintain suitable aquarium water conditions.

Stage 1 – Mechanical Filtration

Foam media traps suspended particles, uneaten food and fish waste, helping maintain clear aquarium water.

Stage 2 – Chemical Filtration

Activated carbon helps adsorb certain dissolved impurities, unwanted odours and discolouration from aquarium water.

Stage 3 – Biological Filtration

Fluval BioMax provides a porous surface for beneficial bacteria to colonise, supporting the natural aquarium nitrogen cycle.

These bacteria help convert harmful ammonia into nitrite and then into nitrate, supporting effective biological filtration.

Designed for Fluval U4 Internal Filters

This replacement media kit is designed specifically for the Fluval U4 Internal Aquarium Filter.

It provides a convenient solution for replacing worn or exhausted filtration media without purchasing a complete new filter unit.

Compatibility: Fluval U4 Internal Aquarium Filter.

Easy Installation & Maintenance

Regular filter maintenance helps maintain water flow and effective filtration performance.

• Disconnect the filter from the electrical supply before maintenance.
• Remove the existing filter media according to the manufacturer's instructions.
• Rinse new media as recommended before installation.
• Install the replacement media in the correct filter compartments.
• Clean reusable foam media using removed aquarium water to help preserve beneficial bacteria.
• Avoid replacing all established biological media at once, as this may disrupt biological filtration.

Condition – Brand New / Generic Packaging

PLEASE READ THE CONDITION INFORMATION BEFORE PURCHASING.

All filtration media supplied in this kit is brand new and unused.

However, the media is supplied in generic packaging rather than the original Fluval retail packaging.

• Product Condition: Brand new and unused.
• Brand: Genuine Fluval media.
• Packaging: Generic packaging.
• Original Retail Packaging: Not included.
• Compatibility: Fluval U4 Internal Filter.

The alternative packaging does not affect the intended performance or compatibility of the filter media.

Product Specifications

• Brand: Fluval
• Product: U4 Complete Filter Media Kit
• Product Type: Replacement Aquarium Filter Media
• Compatible Filter: Fluval U4 Internal Aquarium Filter
• Filtration Stages: Mechanical, Chemical & Biological
• Mechanical Media: Filter Foam
• Chemical Media: Activated Carbon
• Biological Media: Fluval BioMax
• Application: Aquarium Filtration & Water Quality Maintenance
• Condition: Brand New & Unused
• Packaging: Generic / Non-Retail Packaging

Pack Contents

• Fluval U4 Replacement Foam Filter Media
• Fluval U4 Activated Carbon Filter Media
• Fluval BioMax Biological Filter Media

Complete replacement media set for the Fluval U4 Internal Aquarium Filter.

Important Information

PLEASE NOTE: THIS LISTING IS FOR BRAND-NEW FLUVAL U4 REPLACEMENT FILTER MEDIA SUPPLIED IN GENERIC PACKAGING.

ORIGINAL FLUVAL RETAIL PACKAGING IS NOT INCLUDED.

FILTER NOT INCLUDED: This listing is for replacement filtration media only. The complete Fluval U4 Internal Filter is not supplied.

Always check compatibility with your existing filter before purchasing.

Activated carbon may remove certain aquarium medications. Remove carbon during treatments where instructed by the medication manufacturer.

To protect established beneficial bacteria, avoid replacing all biological filtration media simultaneously.

Keep your aquarium filtration system performing effectively with the Fluval U4 Complete Filter Media Kit, combining foam, activated carbon and BioMax biological media for reliable 3-stage filtration.