Some custom aquariums are luxury homes for fish

Obviously they don't come cheap

A luxury home aquarium
A luxury home aquarium

From the South Florida website: Custom-made aquariums are emerging as pricey fixtures in luxury homes. Prices can range from roughly $5,000 for a 10-gallon tank to $1 million and up for a tank that hold 5,000 gallons of water. London-based Aquarium Architecture sells a lush 1,057-gallon garden equipped with LED lighting to simulate sunrise and sunset, which is believed to decrease stress for certain types of fish. The $40,000 tank also can simulate storms to stimulate breeding. [more] 

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