1 surface acre = 44,100 ft ^2
1 ft^3 = 7.48 gallons
If your pond is 8.5 acres with a depth of 1'; your pond volume would be: 44,100 x 8.5 x 1 = 374,850 ft^3
374,850 x 7.48 = 2,803,878 gallons of water.
So, for every foot of water depth to the pond, you will need to add: 2,803,878 gallons of water. Also, you will need an evaporation/water loss factor which will drive that number up by a certain percentage. That factor will depend on your geographical location and time of year.
Once you are at full pool you would only need to pump the loss factor volume / day.
Hope this helps
Last edited by mnfish; 05/20/13 12:24 PM. Reason: mis typed some numbers
