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The thickness of any particular liner, including pond liners, is generally measured in mils.
Pond liner selection needs the most attention when you’re planning to add fish and plants to your finished pond.
It’s easy to assume that a single layer of pond liner is all you need to keep water in and protect your pond from erosion.
Even once you’ve narrowed down your liner choices to a flexible material, you’re still left with plenty of options.
Some pond liners work well for all uses, but others are strictly limited to specific applications.
When aiming to mimic a natural environment for rapid growth of valuable fish or plants, it’s tempting to choose natural pond lining materials over flexible plastic liners.
Concrete is often portrayed as a permanent or nearly indestructible option for lining your pond. However, it’s not quite as durable or easy to use for pond lining as you might assume.
Large commercial ponds require some kind of flexible or poured-in-place liner since they’re simply too large to cover with a pre-cast cover.
It’s easy to assume that excavation is the most challenging part of building a small to medium sized pond. However, a properly shaped and compacted pond will still lose water and cost too much money to keep filled unless it’s lined.
Many commercial pond liners are marketed as being compatible with potable drinking water supplies or agricultural uses.