Need a new Centrifugal Pump
Well, after moving into our house about 8 years ago, the centrifugal pump driving the Koi pond gave up the ghost.
We live in California, and our electrical bills are rendered pretty scary by running our pump 24/7. So, since we didn't originally build the pond we're not sure which pump we should buy to replace it. Currently we have a sump pump driving the pond, it seems to be doing OK, but its drawing a lot of electricity.
What we have is about 4000 gallons with about 4 -5 feet vertical between the pump location and the waterfall. Our waterfall is about 2 feet wide.
We used to have a sequence pump that did (I think) 3500 - 4500 gallons per hour.
We're looking for any advice you could provide!