Can you actually get a measuement of the tank. There is a formula for figuring out gallonage in a tank.
Tank ( Gallon Volume ) Formula
( L x W x H ) / 231= total gallon volume
ex: 14”x14”x72”…..
14 x 14 = 196
196 x 72 = 14,112
14,112 / 231 = 61.09
61.09 total gallons
1 cubic ft = 7.48 gallons