When choosing a pond pump for your water garden, it is important to choose the correct type of pump for your application.
Magnetic-drive pumps are the best choice for most small to medium sized water gardens. Mag-drive pumps use little energy and last for years. Most carry warranties of three to five years.
If you will be powering a large waterfall or a waterfall or stream that places a large amount of head pressure on the pond pump, a direct-drive may be rerquired.