Koi Care Basics Blog

Which Koi pond liners  are better;  rubber liners or a concrete pond?  Both have advantages and disadvantages.

When a concrete pond is designed and built correctly it can be more permanent. You need to be very careful when designing a concrete pond that you have planned everything properly because once installed it literally is “cast in stone”!

You can form the shape and contours so that they are very smooth and even which is a must to avoid “dead areas” in your Koi pond.

The biggest disadvantage with concrete pond is that because of all the exposed concrete the ph tends to be higher for at least the first three years. There are, however, things that can be done to prevent this.

One way is to let the concrete cure and then coat it with a rubber base paint or epoxy.

A 45 mil rubber liner pond  is not as permanent. Rubber liners also come in a variety of thicknesses, with the thicker liners being more durable but the thinner ones being easier to shape and mold.

This lack of permanence can be a benefit in some situations. If your pond ends up having some design flaws that need changing, or if you need to move or remove the pond, you’ll be glad you’ve chosen a rubber liner.

An additional advantage is that rubber Koi pond liners will maintain a more neutral ph.

Rubber liners also provide a softer surface for your Koi.

A disadvantage of rubber Koi pond liners is that even when the liner  is installed properly you will  still  have some minor folds in the liner. Once you fill your pond these folds will barely be visible.

Another challenge with a rubber lined pond is the rock work around the edges.  If you don’t want the liner to show it will be necessary to camouflage it with rock work and plants.

The challenge is that the rock work will need to extend down into the water but the mortar for the rock work won’t stick to the liner.

Even though a rubber liner is less permanent when it is properly installed it can remain leak free for many years.

Taking into account the pros and cons of each will help you to make your own decision about Koi pond liners!

Alan Deacon
KoiCareBasics.com

The Koi pond liner is one of the most important pieces of equipment will get for your pond. It’s main purpose is to prevent the pond water from leaking into the surrounding soil.

There are numerous types of liners available. Concrete, fiberglass, rigid plastic and flexible liners are the most common and every pond liner has positive as well as negative features.

Knowledge of the positives and negatives of each will help you determine the best Koi pond liner for your pond.

* Concrete pond liners used to be considered the longest lasting liners. People who were building a permanent Koi pond used concrete to line their ponds. Some of the drawbacks that have been discovered with concrete include the leakage of toxins from the concrete into the pond and the higher price of purchase and installation.

* The fiberglass Koi pond liner is considered one of the best pond liners available. The average lifespan of this type of liner is approximately 50 years. They can be installed easily and they expand for ice without cracking. Their only disadvantage is an unnatural look and the extra care needing to be taken with the landscaping to disguise it.

* Rigid pond liners are considered the cheapest in the category and they have a natural look. They are considered good resistors of sharp roots as well as rocks but their drawback is installation problems. These pond liners can not be installed easily. It is very difficult to dig the right size hole to lay the liner in. But it is a great choice for Koi enthusiasts in warm areas. They are rated highly in terms of controlling leakage.

* Flexible pond liners have a minimum lifespan of 20 years and are believed to have a firm resistance against weathering and cold cracking. They are completely non-toxic and you can get them for a fraction of the cost of concrete pond liners. These pond liners are best for almost every climate. Due to their wonderful flexibility you can install them with great ease. This particular type of Koi pond liner is probably the most often purchased.

Prior to installing a Koi pond liner you must decide upon the location where you want to place the pond. The procedure is to outline the shape and size with chalk and colored string. Following this is excavation of the soil from the marked area.

If the hole is deeper than three feet you will probably require a permit from the municipal department in your town or city.

Finally you will fill the bottom of the hole with sand and salt to bring the bottom level. Now the excavated area is ready to accomodate your carefully chosen Koi pond liner!