Marina Slim Filter Cartridge 3-Pack

Got some Marina slim filter cartridges here for your aquarium. These are the ones that fit the S10, S15, and S20 power filters. They're pretty easy to swap out and help keep the water clear for your fish. I have a few of them sitting in this organizer, just looking to get rid of the extras I don't need anymore. Perfect if you're running a Marina slim filter setup and want to stock up on some replacements.