There are several important factors to consider when choosing the best pond liner
for your project. Pond size, climate, pond inhabitants, and budget all come into
play. There are four basic types of pond liners, each with their own pros and cons.
Concrete pond liners are extremely long-lasting, so are good for permanent ponds.
They are not the best choice, however, for ponds including fish, as they can leak
toxins into the water. This requires extensive maintenance of the water to detoxify
it and maintain a safe fish environment. Concrete liners are also very expensive.
Fiberglass pond liners have a long life span of about 50 years. They are easy to
install, but are very difficult to disguise and usually do not look very natural.
These pond liners are more natural looking than the fiberglass option, and are less
expensive. A drawback of this type of liner is that they are difficult to install.
Rigid plastic liners are best in warmer climates, as they do not withstand ice well.
Flexible pond liners are probably the best choice for small backyard ponds. There
are a few types of flexible liners, but the 45 mil EPDM is the most popular. It has
a 20 year life span, is good for all climates, and is safe for fish. This inexpensive
liner is easy to install due to its flexibility, allowing it to conform easily to
the varied shapes of a backyard pond or garden.