To help determine the size of pump needed for any particular water garden, calculate the volume of the pond in gallons using the following formula: L x W x D x 7.5 = pond volume
[L (length of pond in feet) x W (width of pond in feet) x D (depth of pond in feet) x 7.5 = pond volume in gallons]
It is recommended that the water be circulated at least once an hour. For example, a 5,000 gallon pond will need at least a 5,000 GPH pump. Please note that ponds utilizing a waterfall or other water features should use a pump with 25-50 percent more flow than the actual pond volume.
Please Note: Unless otherwise specified, our pond pumps are all considered submersible pumps. They are to be installed below the pond's water line (or under water). They cannot be left to run dry or they will be severely damaged. We sell an assortment of accessories meant to protect your pump on this page and the pages that follow.