Pond Pump Size Calculator
An undersized pump is one of the most common causes of poor water clarity — this calculator works out the flow rate your pond actually needs, based on pond type, sunlight exposure, and any fountain or water feature, then shows real pumps from our full pump range that match.
Pond Pump Size Calculator
Work out the flow rate you need, and see real pumps that match it.
Recommended flow rate: 0 L/H
Turnover ratio applied: Koi 1x, Goldfish 1.5x, Nature/wildlife 2x pond volume per hour, +25% for full sun, +100L/H per 10cm of fountain/feature height.
Frequently Asked Questions
Why does pond type change the flow rate needed?
Koi ponds, goldfish ponds and natural wildlife ponds carry different bioloads and clarity expectations, so each is sized against a different turnover multiple of the pond's total volume per hour.
Why does sunlight matter?
Ponds that get more than half a day of direct sun grow algae faster, so a higher turnover rate helps keep water moving through the filter and UV clarifier before algae has a chance to establish.