Aqua UV Ultra Bio-Media
Made by Aqua Ultraviolet, this media has a very high bio-film surface. Superior bacterial adhesion and colonization. Excellent flow through the Patented "Y" Shaped media. A premier choice for biological/mechanical filtration. Similar to Aqua Ultima Filter media but not the same.
To convert an old sand filter to a bead filter or replace your lava-rock with this media.