DGSL Pond Liner 20 Mil | 7 x 10 ft HDPE for Ponds, Water Gardens, Koi

Overview

DGSL Pond Liner is a 20 mil thick HDPE sheet designed for outdoor ponds, water gardens, koi habitats, and small aquaculture projects. Sized at 7 x 10 ft, it offers a flexible yet robust barrier that adapts to uneven ground, root systems, and gentle slopes. The material is plasticizer-free, supporting long-term outdoor use and reducing the risk of additives entering the water. Its clean, natural-looking finish helps the liner blend with stones, plants, and water movement for a cohesive garden aesthetic.

For DIY enthusiasts, the 7 x 10 ft footprint provides manageable handling while still delivering durability. The liner is designed to stand up to the elements without compromising a secure water containment system, making it possible to create a visually appealing pond without sacrificing reliability.

Key benefits

• Durable HDPE safety material: The liner remains malleable and flexible, with strong resistance to punctures and tears, and it is plasticizer-free for long-term outdoor use.
• Koi conservation mindset: Built to protect and endure, it resists stress cracking and harsh conditions, helping maintain reliable water containment in diverse environments.
• Wide application: Fitting irregular surfaces, it suits retention ponds, above- and below-ground containment, water gardens, fish ponds, and backyard waterfalls with gentle slopes and smooth contours.
• DIY-friendly sizing: At 20 mils thick and scalable up to 20 x 36 ft, it offers flexibility to fit small to mid-sized ponds and easy cut-and-fit installation.
• Ease of use: The liner works with a flat underlayment surface, and adding a layer of round pebbles around the edges can extend service life while adding a natural aesthetic.

Ideal uses and practical setup

• Water gardens and koi ponds: Create a natural, clean edge that complements aquatic plants and decorative features.
• Backyard waterfalls and streams: Shape and secure a containment layer that tolerates continuous water movement.
• Small to medium ponds: The 7 x 10 ft size is well suited for DIY projects that require straightforward cutting and fitting.

Tips for longevity

• Prep well: Clear debris and sharp edges from the base before laying the liner to prevent punctures.
• Edge protection: Consider pebbles or stone around the perimeter to cushion and protect the liner over time.
• Proper slope: Use gentle slopes to minimize stress points and maintain even water distribution.