Penn Plax Cascade 300 Filter with Internal Replacement Cartridge, 2-Pack
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<b>[Product Information]</b><br>
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<li>Convenient, no-fuss replacement cartridges for your Cascade 300 internal power filter</li>
<li>Activated carbon removes ammonia & nitrites keeping your aquarium healthy</li>
<li>Easy-to-replace disposable filters</li>
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