A typical wide 200-gallon aquarium measures 96 inches wide, 25 inches deep and 20 inches tall. A taller 200-gallon aquarium measures 72.5 inches wide, 24.5 inches deep by 27.5 inches tall. A 200-gallon bow front aquarium measures 72 inches wide, 18 inches deep and 30 inches tall.
The dimensions of a 200-gallon aquarium can vary depending on the exact shape selected. The weight of a 200-gallon aquarium complete with water, decorations and fish can be close to 2 tons. Special stands and reinforced flooring may be necessary to support an aquarium this size. Aquariums can be made out of glass or acrylic.