The use of pond liners is a common practice in the creation of backyard ponds, but there are several reasons why they may not be the best choice for long-term water features. This article delves into the drawbacks of pond liners, offering insights into why they may not be as reliable or efficient as one might think. From inevitable leaks to limitations in pond design, we explore the reasons why some professionals choose alternative methods for constructing ponds.
Pond liners, despite their popularity, are not immune to the forces of nature. Manufacturers may offer warranties ranging from 15 to 30 years, with claims of a 75-year life expectancy. However, once installed, a myriad of factors can compromise their integrity. Wildlife such as gophers, rodents, and even moose in certain regions, along with tree roots and sharp objects, can puncture or tear the liner. A small hole can result in the loss of five gallons of water every day. Locating and repairing leaks is a labor-intensive process that involves draining the pond and inspecting the liner inch by inch.
Bottom drains are essential for maintaining a clean and healthy pond environment, but they are incompatible with liner ponds. The installation of bottom drains in liner ponds often leads to leaks due to the sealants and pressure rings failing over time. This results in costly and time-consuming repairs.
Liner ponds typically require the use of sump pumps, which are not energy-efficient and can be a hazard to both fish and humans. They consume a significant amount of energy and require frequent maintenance. In contrast, above-ground pumps are more energy-efficient, cost-effective, and require less maintenance, potentially saving hundreds of dollars in energy costs annually.
High-pressure maintenance-free biofilters, which are efficient and easy to clean, cannot be used with liner ponds. Instead, liner ponds often use gravity feed bio-falls or upflow filters, which are less efficient and require frequent, messy cleaning.
The loose rocks used to conceal the edges of pond liners can shift or tilt, posing a risk of injury or drowning. Professional concrete and rebar constructions cement rocks in place, providing a safer environment.
Liner ponds are often limited to circular or oval shapes due to the nature of liner material being dispensed on rolls. Custom-shaped liners are available but can be as costly as more durable, professionally constructed ponds.
The integrity of a pond is paramount, and the profit-driven approach of some liner pond constructions raises concerns. Concrete and steel ponds offer a lifetime warranty, whereas liner ponds may only offer a one-year warranty, if any. The long-term costs of maintenance and repair can outweigh the initial savings of a liner pond.
While pond liners may have their place in temporary or rental situations, they often fall short in terms of durability, efficiency, and safety compared to professionally constructed ponds. The choice between a liner pond and a more permanent solution should be made with careful consideration of these factors.
For more detailed information on pond construction and maintenance, the Aquascape and Pond Trade Magazine websites offer a wealth of resources and expert advice.
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