Bestway 4.2 in. x 8 in., 0 sq. ft. Cartridge Swimming Pool Filter Pump Replacement (18-Pack) 18 x 58012E-BW - The Home Depot
Amazon.com : JUWO 2-Pack Pool Filter A or C Kit Replacement for Intex 1000/1500/530 GPH Above Ground Pool Pump, Replace Part Type A or C : Patio, Lawn & Garden
Amazon.com : Intex 0775431 Filter Cartridge for Swimming Pool Blue 10,8 x 21,6 x 20,3 cm - Set of 2 : Patio, Lawn & Garden