Adaptable to harsh environment

eliminating time consuming cleanouts

an internal water depth of 15

Example: A round pond that has a 12' diameter and is 1

Atlantic Water Gardens Black Media Bag 18"x 22" uv parts Adaptable to harsh environmentAtlantic Water Gardens Black Media Bag 18"x 22" Expanded clay Bio Rocks provide an optimal environment for beneficial bacterial colonization due to their high surface area. They are also more stable and less abrasive than lava rock and gravel, while still providing all of the surface area. Bio Rocks are easy to clean and have a 5 year warranty. Use one box of Bio Rocks per BG2234 Media Bag. FEATURES Atlantic's Media Bags are made with triple stitched,