United Pet Group Whisper Bio-Bag Cartridge for Aquarium, Large, 12 count (2 Pack)
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<b>[Product Information]</b><br>
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<li>Convenient 12 count (2 Pack) of cartridges</li>
<li>Easy to Assemble; Easy to Replace</li>
<li>The Whisper Bio-Bag multi-packs come unassembled and offer economical pricing on larger quantities</li>
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