Best Pond Pumps: How to Choose, With a Side-by-Side Comparison

We do not rank pumps from one to ten, because no ranking survives contact with a real pond. Instead this page gives you a three-step way to choose and a side-by-side look at the published figures for three widely sold pumps, so you can see how to read them.

Step 1: Know your three numbers

1. Pond volume. Length × width × average depth × 7.48 gives US gallons for a rectangular pond.
2. Target flow. Roughly the pond volume once an hour for a goldfish pond, more for koi, less for a pond with no fish. Add the needs of any waterfall.
3. Total head. The lift from the pond surface to the outlet, plus pipe friction.

The pond pump size calculator works out all three. The method is explained in what size pond pump do I need.

Step 2: Match the pump type to the job

Step 3: Compare published figures side by side

The table below shows three submersible pumps from long-established pond brands at three different sizes. They are examples chosen to illustrate how specifications scale, not a ranking, and they are not the only good options.

How to read the comparison

• Maximum flow is not what you will get. It is measured with no lift. Each of these pumps delivers less once it is raising water and pushing it through pipe.
• Maximum head tells you how well flow holds up. The smallest pump here has a 9 ft maximum head, so at 5 ft of lift it has used more than half its range. The larger pumps have far more in reserve, which is why they suit waterfalls.
• Power scales with the job. Running continuously at an illustrative 17 cents per kWh, 58 W costs about $86 a year, 160 W about $238 and 173 W about $258. See running costs to use your own rate.
• Bigger is not better. A 3,000 GPH pump on a 500-gallon pond wastes electricity and may exceed the filter’s maximum flow.

How we selected and checked them

We chose pumps from manufacturers that publish specifications and manuals, that are widely available in the United States, and that between them cover small, medium and larger installations. We compared the manufacturers’ published figures with current retailer listings and recorded the date we checked. We have not bench-tested these pumps, and we say so plainly: this is desk research. Where sources disagreed, the note under the table says so. Read more about how we research products.

What to check before you buy any pump

• The flow on the pump curve at your total head
• That the flow does not exceed your filter’s or UV clarifier’s maximum
• Power consumption, and what it will cost over a year
• Outlet size against the hose you plan to use
• Cord length to a GFCI-protected outdoor socket
• Warranty length and the availability of spare impellers
• That the current listing matches the model number you researched

Our complete buying guide explains each of these in detail.

Common questions

Which brand of pond pump is best?

We do not name a single best brand. Established pond manufacturers that publish pump curves, offer multi-year warranties and sell spare parts are a safer choice than unbranded pumps with only a maximum flow figure, because you can verify what you are buying and repair it later.

How much should I spend on a pond pump?

Enough to get a pump correctly sized for your pond with a published curve and a reasonable warranty. Beyond that, extra money is best spent on efficiency, since the electricity usually costs more than the pump over its life.

Do I need a separate pump for a waterfall?

Not always. One pump can feed a filter and a waterfall if the flow suits both. When the waterfall needs much more water than the filter can accept, a second pump or a bypass is the answer. See matching a pump to a filter.