External Koi Pond Pumps

About

External Pond Pumps from AllPondSolutions For owners of larger garden ponds or swimming pools, the use of an external pond pump, or dry pond pump, is an essential purchase. Generally used as part of a gravity fed filter system, external pond pumps are perfect for large pools and koi ponds as they process a greater volume of water, and their robust and durable design ensures longevity and efficiency year after year. .aps-buying-guide{margin-top:1.25em;padding:0.9em 1.1em;border:1px solid rgba(0,0,0,0.15);border-radius:8px;background:rgba(0,0,0,0.02);}.aps-buying-guide summary{cursor:pointer;font-weight:600;}.aps-buying-guide[open] summary{margin-bottom:0.6em;} Buying guide Getting the size right is the key to a healthy koi pond and a happy pump. Choose a model that's too small and your filter won't receive enough flow to keep the water clear; too large and you'll be paying for running costs you don't need. As a general rule, you want your entire pond volume to turn over through the filter every one to two hours, though this depends on stocking levels and any features like waterfalls or bottom drains adding extra head height to factor in. If you're unsure where to start, use our pond pump size calculator to work out what you need before you buy. Get the sizing right and you'll enjoy clean, well-oxygenated water and healthy koi with minimal ongoing running costs.