Red Sea Fish Pharm ARE50020 17-Inch Berlin Air Lift Protein Skimmer for Aquarium, 90-Liter
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<b>[Product Information]</b><br>
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<li>Berlin air-lift is a high performance, low cost internal skimmer based on the berlin triple-pass principle</li>
<li>The triple-pass is combined with a powerful venturi air injector, greatly enhancing the efficiency of the skimmer</li>
<li>The air bubbles move down the chamber by the force of the water current until reaching the air return skirt located at its base</li>
<li>The air-lift is powered by a lime wood air-stone attached to an external air pump, these compact units are easy to install and maintain</li>
<li>Measures 17-inch height by 4-inch diameter</li>
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