Instructions: Rinse cartridge with warm water before using. To change filter, simply remove old cartridge by pulling up on the plastic tab. To replace, slide cartridge into plastic grooves and push until cartridge snaps into place.Warning: Disconnect the plug of all appliances inside the aquarium before performing maintenance. Keep out of reach of children. Inspect product and discard if any part becomes loose, detached or damaged. Wash hands with soap and water after handling.
Petco Power Filter 5 Replacement Filter Cartridges