That is impossible. :duh: A wooden floor sits on joyces. A joyce sits between 16 to 24 inchs apart apart from each other. Most joyces are 2"by6" or 2"by8". It can hold 5,000 pounds over three joyces, if the jocyes are 16 inchs apart. At 24inchs apart they can hold 3,000 pounds over three joyces. A gallon of water weights 8.33 pounds. Times that by 220 you get 1832.6.
That is just over three jocyes. The lenght of the tank could go farther then that.