Fish Safe Pond Liners

Fish-Safe Geomembrane Pond Liners for Ponds, Water Gardens & Aquaculture

Our fish safe pond liners are engineered specifically for ponds and water features that support fish, aquatic plants, and wildlife. Manufactured from HDPE alloy and LLDPE geomembrane materials, these liners are UV resistant, chemically inert, flexible, and guaranteed safe for aquatic life.

Whether you are building a decorative koi pond, water garden, aquaculture pond, or large containment pond, our fish safe liners provide long-term durability without leaching harmful compounds into the water column.

Guaranteed Fish Safe Materials

All fish safe pond liners offered on this page are:

100% fish safe and non-toxic
Free of plasticizers harmful to aquatic life
Safe for fish, plants, amphibians, and wildlife
UV stabilized for long-term outdoor exposure
Suitable for potable-water-adjacent applications where required

Available material options include:

HDPE Alloy Pond Liners – 10 mil & 20 mil
LLDPE Pond Liners – 20 mil, 30 mil & 40 mil

These materials are widely specified for ponds due to their chemical stability, puncture resistance, and flexibility.

Custom Fabricated Fish Safe Pond Liners

Our pond liners are custom fabricated to your exact or closest dimensions, reducing field seaming and improving overall liner integrity.

One-piece panels available
Panels up to 35,000–40,000 sq. ft. (20 mil)
Panels up to 22,000 sq. ft. (40 mil)
Accordion folded and rolled for easy handling and installation

Custom fabrication minimizes leak risk and speeds installation—especially for large or irregularly shaped ponds.

How to Determine Pond Liner Size

To ensure proper coverage and anchoring, liner dimensions should account for pond depth, slopes, and anchor trench requirements.

Sizing Formula:

Width = Pond Width + (2 × Pond Depth) + 5 ft
Length = Pond Length + (2 × Pond Depth) + 5 ft

Final Liner Size = Width × Length
(Width restrictions apply based on liner type)

Example:
A pond measuring 10 ft × 10 ft × 10 ft deep requires a 35 ft × 35 ft pond liner.

A pond liner calculator is available to assist with sizing accuracy.

Availability & Lead Times

Most custom fish safe pond liners ship in 2–7 business days
During peak production periods, lead times may extend to 1–2 weeks
Transit time varies by destination

Shipping & Freight Information

Liners ≤150 lbs ship via UPS or FedEx Ground
Heavier liners ship LTL or Truckload freight
Freight costs vary by weight, method, and delivery location

Applications

Fish safe pond liners are commonly used for:

Koi ponds & ornamental ponds
Water gardens & landscape ponds
Aquaculture & hatchery ponds
Wildlife ponds
Decorative and functional water features

Contractors, Engineers & Agencies

Contractors, engineering firms, municipalities, and state agencies can access technical documentation, material data, and project support by visiting the main geomembrane products page.

For quotations, recommendations, or assistance selecting the correct pond liner thickness and material, please contact our technical team.