Fits All Biorb and Biube Aquariums. Contains 2 Replacement Foam Filter Discs, 2 Replacement Carbon Packets, and 2 single use Stress Zyme and Stress Coat water conditioning packets. Directions: Remove existing filter from tank, open cartridge and discard foam and carbon media, saving plastic cartridge. Empty one new media packet 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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