Size Gallons / Liters Perimeter 12' x 24' 8,000 / 30,300 66' 14' x 28' 11,000 / 41,600 78' 16' x 32' 17,400 / 65,900 88' 16' x 36' 18,700 / 70,800 97' 18' x 36' 21,000 / 79,500 100' 20' x 40' 27,200 / 103,000 111'