hygger HG137-10W Bio-Bag Filter Cartridges for Aquarium: 16 Pack Aquarium Replacement Filter Cartridges — Open-Box

hygger Original Aquarium Filter Cartridge: For hygger HG137-10W hang-on back filter, include 16pcs Aquarium Filter Cartridges

Deep Efficient Filtration: Double-layer high-density cotton effectively filters particles waste, fish feces and so on; Activated carbon removes odors; Zeolite effectively removes 95% of ammonia nitrogen from the water, purifies the water, increases dissolved oxygen in the water, and keeps the aquarium water environment in a healthy and stable state

3-in-1 Multi-stage Filtration: Physical filtration, biological filtration and chemical filtration three-in-one. hygger aquarium filter cartridge not only can remove water impurities and odor, but also can promote the cultivation of nitrifying bacteria for the aquarium to maintain the environment of the aquarium clean and health

Easy Installation: Simply rinse the replacement cartridge in cool water, remove the surface carbon powder, align the keyway on the bottom of the cartridge and insert the cartridge into the filter chamber

Tips: For optimal performance, replace the filter cartridge approximately every 2-4 weeks for cleaner water and fish

hygger HG137-10W Bio-Bag Filter Cartridges for Aquarium: 16 Pack Aquarium Replacement Filter Cartridges