Finest Aquatics 4 x Compatible Foam and 4 x Compatible Polycarbon Carbon Filter Cartridges and 170g Compatible Biomax to fit Fluval U4 Internal Filter

Product Features

• Set of 4 x compatible foam, 4 x compatible polycarbon and 170g compatible biomax suitable for the Fluval U4 internal filter.
• 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.
• The biomax provides a large surface area for beneficial bacteria to colonise to help biologically filter the water by removing ammonia and nitrite for clear, healthy aquarium water.
• Please Note: This is not a Fluval Product. This is a Finest Filters alternative which serves the same purpose as the original brand.