Caution!!!
Many pump manufactures under estimate the size of pump required, so that it appears a cheaper, smaller air pump of theirs will do the job of a larger competitors air pump.
The tables below have been obtained after more than 40 years experience of how much oxygen is required by bacteria and aquatic life under all conditions.
Remember the higher the water temperature the less dissolved oxygen (DO) the water can hold.
Pond Air Pump Sizing
| Volume in gallons | 1,000 | 2,000 | 3,000 | 4,000 | 5,000 | 6,000 | 7,000 | 8,000 | 9,000 | 10,000 |
| Volume in litres | 4,500 | 9,000 | 13,500 | 18,000 | 22,500 | 27,000 | 31,500 | 36,000 | 40,500 | 45,000 |
| Litres air / min to maintain DO Safe Levels | 40 | 80 | 120 | 160 | 200 | 240 | 280 | 320 | 360 | 400 |
Lake Air Pump Sizing
Use 1 hp motor per acre
