How fast should the water in Koi ponds be circulating through the filter system?
On ponds up to about 4000 gallons, all the water in the pond should pass through the filter in a 1 to 2 hour period for best results. In larger ponds a turnover rate of every 2 – 3 hours has been found to work quite adequately. So for a pond of 3000 gallons a pump that circulates 1500 gallons an hour through the filter would be fine. Remember to choose a pump that will move the correct amount of water per hour at the height and distance you need to pump it. Most pumps quote the maximum capacity they will circulate and this will drop dramatically if you need to lift the water up to a high waterfall for example.
Related Questions
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