I am in the process of enlarging my outdoor pond and I am told that I need to get a larger pump, 5000 gph or larger. Can anyone recommend a name brand that has a good warranty and low electrical usage?
what kind of pump?
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Perhaps a Floating Aerator Fountain. Kasco makes a 1/4 h.p. one. I think it's about 5,000 gph. And, you can find smaller ones as well as other brands. Then just keep your smaller pump as well. My pond is 40x40x5 and a 1/2 h.p. is recommended. The wattage here is @ 300.
My company has had excellent luck with Tsurumi brand pumps. We've had clients run them dry when they were gone over the weekend. The pump still worked like a champ after water was added. Good units!
tsurumi pumps are the way to go! but if you can find one that is magnetic driven instead of direct drive, the pump will pay for itself over time 
wow you must have a big pond in order to need a 5000 gph, I am gueesing 10,000 gallons plus or you're pushing a high lift waterfall 
wow you must have a big pond in order to need a 5000 gph, I am gueesing 10,000 gallons plus or you're pushing a high lift waterfall If you’re truly moving up to 5,000+ GPH, I’d focus less on just the brand name and more on efficiency (watts per gallon moved) and warranty support.
For outdoor ponds, I’ve had good luck with external pumps over submersibles at that size. They’re usually more energy-efficient long term and easier to service. Look at brands like Sequence or EasyPro — both have solid reputations in the pond world and typically offer multi-year warranties. The Best Pond Pumps From EasyPro line, for example, tends to balance decent flow rates with relatively low amp draw compared to a lot of big-box store pumps.
One thing I’d double-check before buying:
A 5,000 GPH pump at zero head might only deliver 3,500–4,000 GPH once it’s installed, so reading the performance curve matters more than the box rating.
If electrical usage is a big concern, compare watt draw at your expected head height. Sometimes two smaller efficient pumps cost less to run than one oversized unit working hard.
In short: pick based on flow curve + watt draw + warranty, not just GPH rating. That’ll save you money long term and keep the pond stable.
For outdoor ponds, I’ve had good luck with external pumps over submersibles at that size. They’re usually more energy-efficient long term and easier to service. Look at brands like Sequence or EasyPro — both have solid reputations in the pond world and typically offer multi-year warranties. The Best Pond Pumps From EasyPro line, for example, tends to balance decent flow rates with relatively low amp draw compared to a lot of big-box store pumps.
One thing I’d double-check before buying:
- Actual head height (how high you’re pushing water)
- Plumbing diameter (undersized pipe kills flow and efficiency)
- Whether that 5,000 GPH recommendation is based on total pond turnover or just feeding a waterfall/filter
A 5,000 GPH pump at zero head might only deliver 3,500–4,000 GPH once it’s installed, so reading the performance curve matters more than the box rating.
If electrical usage is a big concern, compare watt draw at your expected head height. Sometimes two smaller efficient pumps cost less to run than one oversized unit working hard.
In short: pick based on flow curve + watt draw + warranty, not just GPH rating. That’ll save you money long term and keep the pond stable.