Fits All Biorb and Biube Aquariums. Contains 2 Replacement Foam Discs and 2 Replacement Carbon Packets. Directions for replacing a spend filter: Remove existing filter from tank, open cartridge and discard foam and carbon media, saving plastic cartridge. Empty one new granular media packet (carbon and zeolite) into cartridge, followed by one foam filter. Re-assemble filter and place back in tank. The filter cartridge in your biOrb should be changed every 4-8 weeks. Frequency of filter changes depends on the size of your biOrb and the fish stocking level. Please refer to your biOrb instructions for further details.
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