dsn112-
Your Oceanic reef ready may have a tempered bottom but it is not an Ultimate I am afraid. Oceanic briefly made tanks with tempered bottoms between 2005 and early 2006 in their old Dallas, TX location. The Ultimates have only been made AFTER the move to Franklin, WI and have only been made out of float, annealed glass. Unless your tank is a Tech tank your aquarium would also not have a Starphire front panel like the Ultimates do.
Andy