Using Concrete as a Pond Liner: Pros, Cons, and Best Practices

Concrete is a popular choice for koi ponds due to its permanence and ability to support mortar and rock features like waterfalls. George, a pond owner with 35 years of experience, confirms that concrete works well if the sides and bottom are smooth and sealed with a waterproofing agent. He adds that many koi ponds are built with concrete, and some are later lined with fiberglass for extra protection.

Key Considerations

• Ensure surfaces are smooth to prevent fish injury.
• Apply a waterproof sealant to the concrete.
• Black dye can be added for aesthetic appeal.
• Concrete ponds can last decades with proper construction.

George's own pond has been in use for nearly 35 years without issues. For more details, visit his website: koi-z-are-us.20m.com.