How to Choose a Pond Liner

Choosing a liner is one of the most important steps in building a koi pond. The liner is the foundation of your pond and like all foundations you want one that is going to stand the test of time. Here at PondBiz we only sell Firestone 45 mil EPDM rubber liners because they are flexible, durable and are proven to last 20 or more years unlike PVC liners which can deteriorate in as little as one year leaving it up to you, the pond owner, to dig everything up and replace it which can be a serious headache. However, by installing a proper pond liner you can avoid that headache and enjoy your pond for many years to come. It is also important to use a proper underlayment to protect the liner from tree roots or rocks that could puncture the liner from below.

The Proper Pond liner is one that is fish safe, highly flexible, weather and UV resistant and durable. You need to keep these things in mind when purchasing a liner. If the liner you’re looking at is lacking in any of these key components than its time to look for a higher quality liner. A standard pond being 11 feet wide by 16 feet long and 2 feet deep can exceed 10 tons, over 20,000 pounds of water. It is important that the material can handle all the weight or there could be many problems with your pond in the future. If your liner isn’t given enough overlap then the weight of the water could tear it, leaving you with a king sized muddy mess.

To calculate what size liner you need take the maximum length of your pond let’s say that it’s 10 feet then you take the maximum depth let’s say that its 3 feet, you take the depth and multiply it by 2 and then add 2 feet to the total to account for sufficient overlap so we have 10+6+2=18ft and that gives us the length of your liner. You now have to repeat the formula substituting the length for the width. Assuming the width is 7ft then it would be 7+6+2=15 and the liner size you would need is 18×15. You can also refer to our Pond Calculator on our Website. For information on Firestone 45mil EPDM Liners watch this video.

We hope that this information has made choosing a liner easier for you.

Thanks for reading and Happy Ponding from the PondBiz family!

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