Pool Filter Cleaner: Remove dirt, soap, grease and film to effectively clean all cartridge filter elements in your swimming pool and keep it working efficiently Doheny's Pool Supplies: A family-owned business that’s grown into America’s leading pool supply company by making your satisfaction our priority Recommended Dosage: Dissolve 1 lb of Cartridge Filter Cleaner in 5 gallons of water before adding to your swimming pool. If your filter cartridge is taller than the water, simply flip it upside down and repeat the soaking process. Specially Formulated: Pool filter cartridge cleaner has an effective formula that allows to easily clean your pool cartridge filter Packaging: This pool cartridge cleaner comes in convenient 2 lb bottle(s) Doheny’s Pool Stain Remover helps remove stains, residue, and spots from all surfaces in your swimming pool. Doheny’s is a family-owned swimming pool business that’s grown into America’s leading pool supplies company by making customer satisfaction our #1 priority.