This is a Twin Pack of new Bestway Filter Pump replacement cartridges for Size I, 330 gal. (220-240V)gal/hr and Size II, 500/530/800 gal p/h pump system. When conditions are ripe for a swim or paddle you'll probably be using your above ground pool on a more frequent basis. During periods of prolonged use you may notice pool water turning a little murky. This is probably because your filter pump isn't working as effectively and the most common reason is a blocked filter cartridge. Cleaning and rinsing the cartridge will only sustain it for so long before it stops working completely. To keep pool water clean and clear it's vital to replace your filter cartridge at least every two weeks. If you're unsure whether the Bestway Filter Cartridges are compatible with your swimming pool filter pump you should always refer to your filter pump manual.

• Twin Pack Bestway Filter Cartridges available in two sizes
• Size I for 330 gal. (220-240V) gal/hr filter pumps
• Size II for 500/530/800 gal p/h filter pumps
• Size IV for 2500 gal filter pumps
• Size VI for Lay z Spa products
• For Helps to maintain clean, clear & healthier pool water
• Ensures that filter pump runs more efficiently
• Should be replaced every two to three weeks
• 1 Pack contains 2 Cartridges Except Size IV (4)