And Compatibility: Keep your aquarium clear and your fish healthy with this compatible CF2 fish tank filter cartridges 3-month service kit, designed specifically for the Internal Filter CF2 Reliable Designer: Say goodbye to toner leaks and water contamination! Aquarium cartridges fish tank filter sponges are made of evenly distributed cotton to they don't impede water . This ensures consistent and efficient filtration for your aquatic ecosystem Package Content: The set contains 4 replacement filter cartridges and 4 replacement pads (5 mm), each filter floss is carefully designed to effectively remove harmful toxins, ammonia and heavy metals from your aquarium water, providing a clean and healthy environment for your fish and plants Quick Installation: Turn off the filter, remove the used and rinse the new underwater to remove dirt. After rinsing, insert the filter floss aquarium into the rinsing chamber and make sure the is completely in the rinsing chamber High-Quality Cartridges: We are committed to using high-quality filter media to effectively purify water of impurities. cf2 filter service pack 4 month and we recommend that you change your filter every 2 to 4 weeks And Compatibility: Keep your aquarium clear and your fish healthy with this compatible CF2 fish tank filter cartridges 3-month service kit, designed specifically for the Internal Filter CF2 Reliable Designer: Say goodbye to toner leaks and water contamination! Aquarium cartridges fish tank filter sponges are made of evenly distributed cotton to they don't impede water . This ensures consistent and efficient filtration for your aquatic ecosystem Quick Installation: Turn off the filter, remove the used and rinse the new cartridge underwater to remove dirt. After rinsing, insert the filter floss aquarium into the rinsing chamber and make sure the is completely in the rinsing chamber High-Quality Cartridges: We are committed to using high-quality filter media to effectively purify water of impurities. cf2 filter service pack 4 month and we recommend that you change your filter every 2 to 4 weeks Color: As Shown Material: Filter Cotton Package Contents: 4 replacement filter cartridges 4 replacement pads Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.