My pond is clay lined and I have a pump rated at 60 gallon per minute. I loose about 2 inches per day more or less because of evaporation. My pond held on fillup approximately 2 1/2 million gallons of water and we had a very big rain at that time also. I have a dip in the berm where it could over flow if needed. on a refil the other day I pumped for about 26 hours or 9360 gallons unless I figured incorrectly.
