Top 10 Best Fluval U4

Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums. Sleek design with easy grip water control panel and redesigned media cartridge to trap more debris. Convenient flip-top lid allows for quick and easy access to filter cartridge for maintenance or replacement. Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature or vertically against aquarium wall to create currents or customized flow patterns. Designed for freshwater, saltwater and reptile environments up to 65 gallons.

Chemical filter media with two unique filtering sides that combine to provide thorough chemical filtration. Polyester side filters out fine debris and contaminants. Carbon side filters out harmful liquid substances, colorants and odors. Suitable for freshwater, saltwater or reptile environments. Includes two cartridges designed for use with the Fluvial U4 Underwater Filter.

Provides effective mechanical filtration. Fits perfectly inside the filter chamber to prevent debris from escaping. Ideal pore size allows efficient water flow, less clogging and long-lasting filtration. Suitable for freshwater, saltwater or reptile environments. Specially designed for use with the Fluval U4 Underwater Filter.

Chemical filter media. Polyester side filters out fine debris and contaminants. Carbon side filters out harmful liquid substances, colorants and odors. Suitable for freshwater, saltwater or reptile environments. Convenient 2-pack format.

8 Filter Foam Pads Total 4 Packs with 2 per Pack. Provides effective mechanical filtration. Custom fit for the Fluval U4 Filter. Easy to replace. Works in freshwater, marine or reptile environments.

Provides effective chemical filtration. Custom fit for the Fluval U4 Filter. Promotes growth of beneficial bacteria. Fits the Fluval U2, U3 and U4 Filters.

Provides effective chemical filtration. Custom fit for the Fluval U4 Filter. Provides effective mechanical filtration. Custom fit for the Fluval U4 Filter.

Replacement impeller for Fluval U4 Filter. Ideal for 34-65 gallon environments. Replacement part for the Fluval U4 Only. Country Of Origin Italy.

Finest-Filters compatible replacement foam and polycarbon filter cartridges are made from the same material as the Fluval originals.. These filter pads are made to fit the Fluval U4 range of internal filters. The plain filter sponges contain the biological cultures, biologically and mechanically filtering the aquarium water. The polycarbon filter cartridges remove small particles from the water, and the activated carbon chemically filters the water of impurities. Please Note This is not a Fluval Product. This is a Finest-Filters alternative which serves the same purpose as the original brand..

Our carbon filter pads are intended as an alternative to the polycarbon cartridge, and offer excellent chemical carbon filtration in the aquarium.. These filter pads are cut to fit the Fluval U4 range of internal filters.. Please note There is no poly side to these filters. They are just Activated Carbon impregnated foam.. This is not a Fluval Product. This is a Finest-Filters alternative which serves the same purpose as the origional brand..