AquaTop ATP Crtrdg Forza 5-15

The Forma 5-15 replacement cartridge insert is made of strong poly-fibber and collects organic debris for easy removal. Filled with aquatops premium activated carbon, These replacement cartridges are extremely easy to install, and help keep aquarium water crystal clear and free from odor. Note: Aquatop recommends replacing the filter insert filled with premium activated carbon every 4-6 weeks. Aquariums with heavier livestock loads may require more frequent replacement.