• When the toilets are closed, the water level in tank 2 rises due to the displacement of water in tank 1.
  • As the toilet space is flooded, buoyant elements that form part of the toilet bay structure float with the rising water level to peel away the outer skin.
  • Once the toilet bays have been effectively peeled open, cat fish known for their cleaning abilities can enter the toilet space to perform their night time cleaning duties.
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