LTWHOME Bio Sponge Fit for Penn Plax Cascade 300 Internal Filter Replacement Cartridges(Pack of 6) Provides a breeding ground for

Provides a breeding ground for beneficial bacteria

Packing include: 6pcs actived carbon filters

Pack include: 6 x Carbon filter

12 x Fine filter

Custom designed and manufactured for Aqueon QuietFlow LED PRO Power Filter 10

LTWHOME Bio Sponge Fit for Penn Plax Cascade 300 Internal Filter Replacement Cartridges(Pack of 6) Provides a breeding ground forPacking include: 6pcs bio sponge Change every 3 4 weeks Custom designed and manufactured for Penn Plax Cascade 300 Internal Filter Optimizes the colonization of beneficial aerobic bacteria removes ammonia and nitrites keeping your aquarium clean and healthy This is not a Penn Plax product and is not covered under any Penn Plax manufacturer's warranty. The Penn Plax brand names and logos are the registered trademarks of their respective owners. Any use