Knowledgebase
Welcome to the BTL Knowledgebase. Ever since we started lining ponds, creating covers, and helping people with their projects, we've gotten asked a lot of questions. Many of these questions are repeatedly asked, so we put together the BTL knowledgebase to help answer any questions you had about a particular subject. We are adding new questions every month, so continue to check back often!
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What is the best thickness for a pond liner?
The right thickness liner for your pond depends more on the product than on a one-size-fits-all magic number.
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How can I seal my pond naturally?
The only truly natural ways to seal a pond will still allow some amount of leaking and seepage.
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Can I put cinder blocks in my pond?
There’s a common misconception that concrete is a hazardous material to fish and is risky to add to a pond.
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Should I put gravel in my wildlife pond?
Since wildlife ponds are not generally cleaned on a regular basis, covering the bottom with rocks or gravel is perfectly fine.
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Can you put bricks in a pond?
Bricks are generally safe and useful to install anywhere around the edges of a pond.
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How do you edge a pond with bricks?
Brick is one of the quickest and easiest materials to use for covering the edge of a pond.
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How do you attach a pond liner to wood?
Ponds are rarely framed in wood, but some older designs require a wood frame to stabilize loose soil around the edges.
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How do you install a waterfall preformed pond?
Waterfall preformed ponds are the quickest way to get a splashing water feature in your backyard.
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What is EPDM pond liner?
Ethylene propylene diene monomer (EPDM) is a type of rubber that is commonly used to make sheets of flexible pond liner.
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How long do pond liners last?
A good quality pond liner should last 20 years or longer with no leaks and little maintenance.
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Can I put a new pond liner over an old one?
It’s best to remove old and damaged liners before adding new layers, but it is possible in some cases to just place down a new liner over the old one.
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Should I put rocks in the bottom of my pond?
There are many types of rocks you can use to anchor a pond liner and disguise its appearance.
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What are the best pond liners?
You’ll find EPDM widely used in the pond industry, but reinforced polyethylene (RPE) is a far better choice for both backyard and commercial projects.
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Should I put stones in the bottom of my pond?
Stones are a popular material for lining backyard ponds with a few disadvantages.
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Can I use black plastic as a pond liner?
Black plastic is a generic term for many different types of flexible materials, so check the actual composition of a product before using it in a pond.
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How do you install a flexible pond liner?
Installing a flexible liner is easier than you think because the material easily spreads to cover the ground by hand.
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Can I use a tarp as a pond liner?
When trying to build a pond in your backyard on a budget, you may be tempted to use common materials like a tarp.
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What is pond underlayment made of?
The material known as underlayment is a geotextile that is thicker than a flexible pond liner.
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