TOM TM1277 Aquarium Filter Cartridge 3 pack fits Rapids Power Filter PF-80. Rapids Power Filter provides total filtration - mechanical, chemical and biological. Easy to service and maintain. Features: 80 gallons-per-hour flow rate; Bio-Grid - provides superb biological filtration; High efficient filter media. Fresh & Marine Water Use. KollerCraft is highly regarded for supplying superior quality, innovative pet products and reliable service.