Pond & Waterfall Pump Calculator
How to calculate the size of pump you need for your pond
Need the Pond Volume? Use our Pond Volume Calculator
Choosing the right pond pump is a very important. If your pump is for a pond filtration system with a skimmer you will want to ensure your pond has a complete turnover at the correct rate. The filtration requirements, the number of fish in the pond and the BOD (biological oxygen demand) will play a part in calculating in how often you want to pump your full volume through the filtration.
The time it takes for the complete volume of your pond to be pumped is called the turnover. Generally a pond should have a complete turnover every 30 minutes to every 3 hours. Smaller ponds need a complete turnover approximately every hour and larger ponds can handle a turnover rate of up to 6 hours or more depending on aeration in the pond, fish density and other natural conditions. Decorative ponds and koi fish ponds have different requirements so it is best to do research on the baste rate for your particular pond and fish load.
An acceptable pond pump flow rate is to have a complete turnover every 1.5 hours.
Pond & Waterfall Pump
To calculate the gallons in your pond you can use the formula Length x Width x Depth x 7.5 or use the
Pond Volume Calculator