Trying to boost numbers by using units people can't picture or comprehend is not very useful. 231000 gallons is 1000 cubic meters, ie a 10 metre cube. Perhaps

Trying to boost numbers by using units people can't picture or comprehend is not very useful. 231000 gallons is 1000 cubic meters, ie a 10 metre cube. Perhaps the number of olympic size swimming pools of a standardized depth may be more useful. Perhaps the number of 3m deep Olympic sized swimming pools or gas/oil storage tanks.