Filter Media Pack Hagen FLUVAL U3 – Activated Carbon and Filter Wool (VAT006748)

The Filter Media Pack Hagen FLUVAL U3 – Activated Carbon and Filter Wool is a replacement media set designed for use with Fluval U3 internal aquarium filters. It combines activated carbon to reduce discoloration, odors and dissolved contaminants with filter wool to capture suspended debris and particulate matter. The pack supports routine maintenance of freshwater aquariums by restoring the filter's mechanical and chemical stages and helping maintain clearer water and improved visual quality.

Advantages

This media pack restores the filtration performance of compatible internal filters by combining two filtration functions in one unit. Activated carbon adsorbs dissolved organic compounds and helps reduce yellowing and odors, while the filter wool provides effective mechanical trapping of uneaten food, plant debris and fine particulates. Using the correct replacement media helps keep flow rates consistent and reduces the need for frequent deep cleaning of the filter housing.

Suitable for

• Routine maintenance of Fluval U3 internal filters in freshwater aquariums
• Removal of discoloration and mild odors from aquarium water
• Trapping suspended debris and improving water clarity
• Temporary support during cycling or after medication, when mechanical and chemical filtration are needed

Key specifications

• Media type: activated carbon and filter wool combination
• Function: chemical adsorption and mechanical particulate removal
• Compatibility: designed for Fluval U3 internal filter models
• Application: freshwater aquariums
• Packaging: replacement media pack for routine filter maintenance

How to use

Turn off the aquarium filter and disconnect power before removing the original media. Open the filter housing according to the filter manufacturer's instructions, remove the used media and rinse the filter compartment with aquarium water if required. Insert the new activated carbon and filter wool media pack in the correct orientation, reassemble the filter, and restore power. Allow the filter to run and monitor water clarity. Replace this media periodically according to water conditions and the filter maintenance schedule.

Usage recommendations

Replace the media pack on a regular schedule and after events that increase dissolved organics (such as heavy feeding or medication). Do not rely on activated carbon when using medications that the carbon will absorb — remove the carbon during medication treatments and replace it afterward. Inspect the filter wool for clogging and replace sooner if flow is noticeably reduced.