H2Show Lost Civilization Background is part of the Lost Civilization World theme for aquariums. The background measures 31 x 16 and is designed to fit a standard 29 gallon aquarium or can be cut to fit smaller aquariums. Includes application gel to clarify scene in background for sharper image. Tape should be used to secure background when applying. Also available in the Lost Civilization World theme are Left Aztec Decoration Right Forest Decoration Crystal Skull Center Piece Decoration and Calander and Snake Combo Pack. H2Show Bubble Maker and LED lights can be used with the center piece decoration or individually for spectacular visual effects. LEDs are available in the following colors Blue Red Green White and Multicolor.