Recommended GPH
3,067
Volume
1,410 gal
Head Loss
4.5 ft
$/month
$15.42
Vertical lift from pump to outlet
Recommended Pump Size
3,067 GPH
1,410 gallon pond
Turnover
0.5 hr
Head
4.5 ft
$/month
$15.42
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Inputs
Result
Volume = pi × 5 × 4 × 3 × 7.48 = 1,410 gal. Recommended = 1,410 × 1.5 = 2,115. Head = 3 + 15/10 = 4.5 ft. Adjusted = 2,115 × (1+4.5×0.10) = 3,067.
Inputs
Result
Volume = 6 × 5 × 2.5 × 7.48 = 561 gal. Recommended = 561 × 1.5 = 842. Head = 2 + 10/10 = 3.0 ft. Adjusted = 842 × 1.30 = 1,095.
Your pump should circulate the entire pond volume once per hour. For a 1,500 gallon pond, you need at least 1,500 GPH. Add 10% per foot of head height (vertical lift from pump to water outlet). A 1,500 gallon pond with 3 ft of head needs about 1,950 GPH.
| Pond Size | Min GPH | Fish Pond GPH | Koi Pond GPH |
|---|---|---|---|
| 500 gal | 500 | 750 | 1,000 |
| 1,000 gal | 1,000 | 1,500 | 2,000 |
| 2,500 gal | 2,500 | 3,750 | 5,000 |
| 5,000 gal | 5,000 | 7,500 | 10,000 |
Head height is the vertical distance water must travel from the pump to the highest outlet point (waterfall, filter return). Every foot of head reduces pump output by about 10%. A pump rated 2,000 GPH at 0 ft head may only deliver 1,400 GPH at 3 ft of head.
A typical 1,500 GPH pond pump uses about 75 watts and costs $7–10 per month running 24/7 at $0.14/kWh. Energy-efficient magnetic drive pumps use 30–50% less electricity than direct-drive pumps. Annual costs range from $80–$130 for most backyard ponds.
Yes, if you have fish. The pump circulates water through the filter, maintaining oxygen levels and removing waste. Turning off a fish pond pump for more than 2 hours can cause oxygen depletion. Decorative ponds without fish can run on a timer (12–16 hours/day).
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Last Updated: Mar 19, 2026
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