<h2>Aqueon - Algae Cleaning Magnet Small</h2><p>Weighted magnet algae cleaner&#046; Small &#045; 1&#047;4" thick glass to 20 gal, Medium &#045; 3&#047;8" thick glass to 125 gal, Large&#045; 3&#047;4" thick glass to 300 gal</p><ul><li>Small</li></ul>