Oase - Pre Filter Sponge - BioMaster - 30 ppi - 6x | Aquasabi - Aquascaping Shop
AAP Filter Max Aquarium Sponge Pre Filter; Fits HOB, Canister
Buy MyfatBOSS Pre Filter Sponge, 12 Pack Aquarium Filter Sponge Replacement Foam Filter for Fish Tank, with High Flow Mesh Media Filter Zipper Bag and Extra Fine Mesh Filter Media Zipper Bag
2pcs black 2.6 inch dia cylinder pre-filter sponge filter media for aquarium - Walmart.com