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Pond pump size chart
Real flow needed at your head height — once every 2 hours for plant ponds, once an hour for goldfish, 1.5–2 times an hour for koi — with UV clarifier size.
US gallons
| Pond | Plants | Goldfish | Koi | UV goldfish | UV koi |
|---|---|---|---|---|---|
| 100 gal (379 L) | 50 GPH | 100 GPH | 150–200 GPH | 5 W | — |
| 250 gal (946 L) | 125 GPH | 250 GPH | 375–500 GPH | 5 W | — |
| 500 gal (1,893 L) | 250 GPH | 500 GPH | 750–1,000 GPH | 9 W | — |
| 1,000 gal (3,785 L) | 500 GPH | 1,000 GPH | 1,500–2,000 GPH | 18 W | 24 W |
| 1,500 gal (5,678 L) | 750 GPH | 1,500 GPH | 2,250–3,000 GPH | 24 W | 36 W |
| 2,000 gal (7,571 L) | 1,000 GPH | 2,000 GPH | 3,000–4,000 GPH | 36 W | 55 W |
| 3,000 gal (11,356 L) | 1,500 GPH | 3,000 GPH | 4,500–6,000 GPH | 55 W | 75 W |
| 5,000 gal (18,927 L) | 2,500 GPH | 5,000 GPH | 7,500–10,000 GPH | 75 W | 110 W |
| 8,000 gal (30,283 L) | 4,000 GPH | 8,000 GPH | 12,000–16,000 GPH | 110 W | 2 × 110 W |
| 10,000 gal (37,854 L) | 5,000 GPH | 10,000 GPH | 15,000–20,000 GPH | 2 × 75 W | 2 × 110 W |
Litres
| Pond | Plants | Goldfish | Koi | UV goldfish |
|---|---|---|---|---|
| 1,000 L | 500 L/h | 1,000 L/h | 1,500–2,000 L/h | 5 W |
| 2,000 L | 1,000 L/h | 2,000 L/h | 3,000–4,000 L/h | 9 W |
| 5,000 L | 2,500 L/h | 5,000 L/h | 7,500–10,000 L/h | 18 W |
| 10,000 L | 5,000 L/h | 10,000 L/h | 15,000–20,000 L/h | 36 W |
| 20,000 L | 10,000 L/h | 20,000 L/h | 30,000–40,000 L/h | 75 W |
| 30,000 L | 15,000 L/h | 30,000 L/h | 45,000–60,000 L/h | 110 W |
These are flows at the working head, not the pump’s headline (zero-head) rating — see pond pump sizing. Koi are not recommended below 1,000 US gallons. Try the pump and UV calculators for your exact volume.