Rock being place on pond liner

Are you getting ready to install a new koi pond for your property? Use the best koi pond liner and ensure you know how to protect your pond and the fish inside. Choosing the right liner can save you money and prevent unnecessary repairs.

Keep your pond beautiful. Read the tips below for choosing the best koi pond liner for your water garden.

Understanding Koi Fish

Japanese koi fish are descendants of Chinese carp. This vibrant species is one of the most popular water pets for pond owners worldwide.

Koi can grow to become quite large in comparison to other pond fish. The largest koi can grow up to several feet in length and weigh over 35 pounds! A great rule of thumb on how many fish each pond should have is 1 koi fish per square foot of surface area.

Koi fish are social creatures and pair well with other species of fish. If you want to increase the animal life in your pond, koi make welcoming hosts. Ensure that any other fish you add to your koi pond have the exact nutritional requirements to survive.

Using the right pond liner is critical to keeping healthy koi. Choosing the wrong type can be detrimental to your fish and the overall health of the pond.

Protecting Your Koi Water Gardens with Liners


Pond With Exposed Liner

In layman’s terms, a water garden is a pond that hosts plants and fish. They require careful installation and upkeep to sustain a healthy life.

Pond liners keep your property safe, whether you have a small backyard pond or a large landscape installation. A pond with water will seep into the surrounding ground over time unless you have clay-rich soil (and even then, it can become an issue!).

By adding a koi pond liner, you keep the water from draining into the ground. This method saves you money on refilling gallons of water every few days or weeks.

Experts recommend adding pond liners even if you have that clay-rich soil. Professionals treat these liners with additives in order to promote healthy living for your koi and encourage aquatic plants to grow. You will not need to worry about your koi fish swimming in murky waters because liners protect the pond from ground mud.

Though liners protect your koi from dangerous elements in the pond, not all liners are the same. Let’s take a look at the best options for your water garden.

Rigid and Flexible Pond Liners

Rigid pond liners, aka preformed pond liners, are popular selections for raised ponds and small outdoor installations. Despite their popularity, they do not make the best liner for koi ponds. These options limit the shapes and sizes you can choose from when building a new water garden.

Many koi pond owners enjoy the level of customization options they have when using flexible liners. You can expect a longer service life from flexible pond liners as well.

Rigid options can freeze and crack easily during colder months. This damage can compromise water quality and the health of your koi.

Flexible pond liners make room for thousands of gallons of water. This choice is ideal for residents who want larger koi ponds on their property. Flexible liners come in a variety of different materials, depending on your needs.

Stop Water from Leaking

Water leaking from ponds is a significant hazard for your koi fish. It also costs homeowners hundreds or thousands of dollars a year on water replacement. Having suitable pond liner materials will stop water from leaking and keep your pond clean.

High-density polyethylene (HDPE) and low-density polyethylene (LDPE) liners are durable, fish-safe materials.

HDPE liners are highly tear-resistant, making them great for ponds that utilize sharp rocks or other potentially dangerous elements. These liners tend to be heavier than LDPE or reinforced polyethylene liners (RPE). They are also more prone to UV light degradation over time.

LDPE liners are lighter and work great against UV degradation. However, they are more vulnerable to tears and damage inside the pond.

RPE options are great for larger ponds that require more overall protection. Though you may need to spend a little more on this material than LDPE and HDPE, you can expect longer life and more protection for your koi pond.

Avoid the Wrong Materials and Use the Best

Aquascape EPDM Liner

Courtesy of Aquascape, Inc.

Ethylene propylene diene monomer (EPDM) is a common material for ponds. This durable rubber liner is excellent for conventional ponds due to its affordability and effectiveness. In fact, koi pond professionals recommend using this liner the most!

EPDM liners are koi fish-safe and can be considered the best option when installing a pond. Here at Amen Corner Ponds, we lay down underlayment prior to the EPDM liner to protect the liner from sharp rocks.

Other Potential Liner Options

PVC is another popular option for pond owners, but it comes with the same chemical risks. PVC is vulnerable to brittleness and cracking due to exposure, making it harmful to koi. These cracks also risk draining the pond quickly.

DIY tarps and similar materials are bad for your water garden. This material does not allow plant life to take root, which is actually a good thing if your plants are properly potted. It is also vulnerable to rapid degradation and tearing, harming fish, and draining your pond.

Make sure that you still apply a liner if you have a concrete casing for your pond. Concrete will erode and crack over time; a liner will help save your pond from leaks and repairs.

Pond Professionals Can Help!

Are you still unsure of which pond liner is best for you? Enlist professionals to help! Amen Corner Ponds provides amazing water gardens for hundreds of homes and businesses a year.

We protect your installation with superior materials and methods. If you want the calming beauty of a koi pond for your outdoor space, look no further. Our professionals will provide you with an in-depth consultation so you know what to expect.

Amen Corner Ponds can also discuss repairing and restoring any ponds that suffer damage. You deserve the peace of mind that comes with owning a lush pond. Relax while our experts do the job right the first time.

Contact Amen Corner Ponds in North Augusta, SC, for the best koi pond liners. Get an over-the-phone consultation by filling out our contact form!