<p>Lava rock in general is one of the best rocks to use in a shrimp tank. Lava rock is extremely porous which provides tons of surface area to grow biofilm and beneficial bacteria. Lava rock  will create natural feeding grounds for shrimp and especially baby shrimp. </p> <p>Black carved lava rock is ideal for an aquarium because it adds character. The holes add depth to the aquarium and provide natural decoration to include in any aquascape. </p> <p>Our nano black carved lava rock is around 1 and a 1/2 - 2 inches per piece. These are great pieces for a shrimp tank. </p> <p><strong>Key Benefits</strong></p> <ul> <li>Will not increase Ph</li> <li>Provide natural feeding ground for shrimp and other algae eaters</li> <li>Provides hiding places for baby shrimp</li> <li>Beautiful texture for aquascaping</li> </ul> <p>For best results we recommend rinsing rocks before addition to an aquarium. Although all pieces are cleaned, it is natural for rock to create additional dust during shipping.</p> <p><strong>You will receive one (1) hand selected piece of carved lava rock. Each piece is inspected and packaged with care to help protect the character of each rock. </strong></p> <p><b>*Each piece is different. The stones you receive will not be identical to the product pictures although are accurate examples of what you will receive.*</b></p>