Opti Clear glass tank with black B/ground and weir; 18300 x 610 x 610 with 19mm glass tank. . Standard glass aquarium. Made locally in sydney. Handcrafted with perfection. Highest grade industrial silicon used. Manufactured with all new glass. Comes with lids. Standard size. Top quality gaurantteed. opti clear glass gives a spectacular view of each and evrything thing inside the aquarium. with blue / black background and a weir.