Big Tanks are 30 gallon tanks that hold up to 60 animals. They are new additions in 2011
To get a big tank, you'll need 5 visitors in Happy Aquarium. Harold is the first visitor. Send a request to friends or try to buy a visitor. Once there are 5 visitors, the tank will be very big and your visitors can see this big tank with original fishes, like the Clownfish and Banggai Cardinal will be extremely small to see. Some items you can purchase, like Spotted Dolphins, Humpback Whales and Great Sharks. There are also some decorations you can purchase. Also, Alligator Gars will be there in the store.