<h2>Marineland - ML BIO BALLS PCML160&#045;360 2PK</h2><p>The Bio&#045;Filter balls provide a large, multi&#045;faceted surface area for the growth of the beneficial ammonia&#045;neutralizing bacteria responsible for biological filtration&#046;</p><p>&#149;BIO&#045;Balls are part of the C&#045;Series Filter Replacement Media and Parts&#046;</p><p>&#149;BIO&#045;Balls do not require replacement unless damaged or destroyed&#046; In the event of excessive buildup, you may gently rinse with water from an established aquarium, if desired&#046; Do not clean with soaps or abrasives and never rinse with tap water&#046;</p><ul></ul>