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6 × 4 ft pond: gallons, liner and pump
A 6 × 4 ft pond with straight sides, 2.0 ft deep, holds 359 US gallons (1,359 litres). Adjust the shape and depth below for your pond.
Volume by depth
| Depth | US gallons | Litres | UK gallons | Oval, same size |
|---|---|---|---|---|
| 1.5 ft | 269 | 1,019 | 224 | 212 (801 L) |
| 2 ft | 359 | 1,359 | 299 | 282 (1,068 L) |
| 3 ft | 539 | 2,039 | 448 | 423 (1,601 L) |
What a 6 × 4 ft pond needs at 2.0 ft
| Liner | 12 ft × 10 ft (with 1 ft overlap) |
|---|---|
| Pump — goldfish | 359 GPH (1,359 L/h) |
| Pump — koi | 539–718 GPH (2,039–2,718 L/h) |
| UV clarifier | 5 W goldfish · 9 W koi |
| Fish | 2–5 adult goldfish · not big enough for koi |
| Water weight | 3,000 lb (1,360 kg) |
Under 1,000 US gallons (3,800 L) is too small for koi, which grow to 18–24 in.
See the guides to liner sizing and pump sizing.
Questions
How many gallons is a 6 × 4 ft pond?
At 2.0 ft deep with straight sides, 359 US gallons (1,359 litres, 299 UK gallons). An oval pond of the same length and width holds about 79% of that.
What size liner does a 6 × 4 ft pond need?
12 ft × 10 ft for 2.0 ft deep with 1 ft of overlap on each edge.
What size pump for a 6 × 4 ft pond?
About 359 GPH (1,359 L/h) of real flow for goldfish, or 539–718 GPH for koi.