AquaDom
The AquaDom in Berlin, Germany, is a 25 meter tall cylindrical acrylic glass aquarium with built-in transparent elevator. It is located at the Radisson Blu Hotel in Berlin-Mitte. The DomAquarée complex also contains a hotel, offices, a restaurant, and the aquarium .The outside cylinder was manufactured on-site from five pieces; the inside cylinder for the elevator was delivered in one piece. The Aquadom is the largest acrylic cylinder in the world, with a diameter of about 11 meters, built on a 9 meters tall concrete foundation. Filled with 1,000,000 liters of seawater, it contains over 1,500 fish of 50 species. The feeding of the fish and the cleaning of the fish tank is performed daily by 3-4 full-time divers. They need 8kg fish food.