Hydor Professional External Canister Filter Media, Activated Carbon, Saltwater
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<b>[Product Information]</b><br>
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<li>Highly adsorbent Saltwater activated carbon eliminates bad odors and polluting substances</li>
<li>400gm pouch</li>
<li>Carbon can be substituted by Zeolite, which is used in some marine aquaria to keep nutrient concentrations low for the benefit of corals adapted to waters</li>
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