Fluval Underwater Filter Poly/Carbon
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<b>[Product Information]</b><br>
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<li>Provides effective chemical filtration</li>
<li>Custom fit for the Fluval U4 Filter</li>
<li>Traps fine debris, improves water clarity and removes impurities</li>
<li>Easy to replace</li>
<li>Works in freshwater, marine or reptile environments</li>
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