Penn Plax Cascade Nylon Filter with Biological Ceramic Rings by Penn-Plax
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<b>[Product Information]</b><br>
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<li>Pack of 4 Penn Plax Cascade Nylon Filter with Biological Ceramic Rings</li>
<li>Convenient, ready-to-use filter bags for use with your Cascade cannister filter.</li>
<li>Contains Bio-Ring® biological ceramic rings to remove ammonia & nitrites.</li>
<li>Filter media fully enclosed in a disposable nylon-mesh bag.</li>
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