Aquatic Connections - Calculating Pump Size

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Calculating Pump Size

A pump should circulate the pond’s water a minimum of once every two hours to provide sufficient filtration.

Pond Volume (Gallons) / 2 = Pump Size (in Gallons Per Hour)

Example: A 2200 gallon pond would need an 1100 GPH Pump to circulate the water once every two hours.

NOTE: If you are adding a waterfall and are only using one pump for the waterfall and filtration - you need a stronger pump than suggested above.

For a Waterfall and Filtration, we suggest the pump size should be at least 2 times the water volume (gallons)

Example: A 2200 gallon pond with a 2 foot waterfall should have at least a 4000 GPH pump to provide sufficient filtration and have a nice flow over the waterfall.

Calculate a pump size:

Pond Volume:

Click on any of the following links for our other calculator pages:

Calculating Electricity

Calculating Liner Size

Calculating Surface Area

Calculating Tubing and Valve Size

Calculating Water Volume