Hayward TigerShark Filter Cartridge Set, Disposable Spring Cleanup, 2 Pk, RCX70103
Use These Tigershark Filter Cartridges For Spring Clean-Up or After An Algae Bloom, or Other Adverse Water Conditions. Increases The Lifespan of The Regular Tigershark Filter Cartridges. 2 Pack of Fibrous Cartridges, Can Actually Be Used Again and Again, Even Though They Are Called Disposable. These Cartridges Don't Actually Trap Much Dirt, but They Are Used to Help Circulation and Aid Your Pool Filter for a Faster Pool Clean-Up, without Sacrificing Your Tiger Shark Carts.