I said that the time and cost of filling up the lake again via trucks would not be a productive use of our economical resources, and I feel that I have showed that further with the example of the NY aquarium (above in this post). Thus, I feel that I have demonstrated that refilling the lake up with trucks is not a great solution to replace 30 million gallons of water. What Mr. A suggested (let rain fill it up) would work (eventually); however, my focus was on how to fill up the lake quickly, as in, much quicker than it takes mother nature to fill it up again.