HOB cartridge
Sicce - Hang on Aqua Filtra 40 complete cartridge - 2 pack
Aqua Filtra 40 Complete Cartridge Replacement (2 Pack) Keep your Aqua Filtra 40 running smoothly with these easy-to-install replacement cartridges. Each cartridge combines mechanical, chemical, and biological filtration to help maintain clear and healthy aquarium water. Simply remove your old cartridge and slide in a new one!