Submersible and External Pumps for Ponds and Waterfalls

Choosing the right pond pump is essential for maintaining clear water, healthy fish, and proper circulation. Below is a guide to help you compare submersible and external pond pumps and determine which option best fits your pond or waterfall system.

Submersible Pond Pumps

Submersible pond pumps operate underwater and are popular for their quiet performance and ease of installation. They are ideal for many backyard ponds and skimmer-based systems.

Best Uses

• Small to medium ponds
• Skimmer and filter-box installations
• Short plumbing runs

Key Considerations

• Keep intake screens clean for proper flow
• Match tubing size to pump outlet diameter
• Use a pre-filter or pump vault when possible

External Pond Pumps

External pond pumps are installed outside the pond and are designed for higher flow rates, longer plumbing runs, and larger filtration systems.

Best Uses

• Medium to large ponds
• High-flow waterfalls and streams
• Bead filters and pressurized filtration systems

Key Considerations

• Must be properly primed
• Plumbing must be airtight to avoid air leaks
• Select a pump based on total head height

How to Choose the Right Pond Pump

• Pond circulation: Many ponds target a full water turnover every 1–2 hours.
• Waterfall flow: A common guideline is ~100 GPH per inch of waterfall width.
• Total head height: Always account for vertical lift and plumbing friction.

Need Help Choosing a Pond Pump?

If you need assistance selecting the correct pump, contact our team with your pond size, waterfall width, head height, and plumbing details. Our experts are happy to help.