Why you should use pond pumps and not
sump pumps in garden ponds
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Ponds need constant, 24 hour water circulation with filtration which
can range from a simple block pre-filter for small ponds to a large
external biological filter for the bigger ponds. It is essential
that the filter is overpowered by the pump.
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They cost more to run
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Pond pumps are designed to pump water at low
pressure and use minimum power.
For example, a pond pump pumping 15,000 litres per
hour uses 250 watts of power, while a high pressure head pump at the
same volume uses 700 watts, an increase of 450 watts, an approximate
cost increase of $742.50 annually.
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Running time
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Pond pumps are designed to run 24 hours a day, 7
days a week, i.e. a 100% duty cycle. A typical sump pump is designed
to pump a large volume of water in a short time, generally about a
10% duty cycle i.e. 6 minutes per hour.
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Could damage your filter
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Pond biological filter systems have a maximum
pressure of 4m to 6m (0.4 to 0.6 bar). Sump pumps will develop
pressures of 10m or more (1 bar or more). This pressure will cause
the filter to leak or burst.
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