How much does a Koi pond cost? How large can a Koi pond be?
If you are considering having a Koi pond built, these are questions you might be asking.
But before we get to pricing and sizes, let’s first take a quick look at some of the requirements for a Koi pond.
Koi will thrive in a functioning ecosystem pond. If you are unfamiliar with ecosystem ponds, please read our post on ecosystem ponds first.
Now, let’s look at some other keys for a thriving Koi pond.
Having a pond of proper depth is important. If a Koi pond is not deep enough, your brightly-colored Koi are within easy reach of any shoreline predators. In climates with winter temperatures, Koi will go dormant during the coldest months. During this time, they will eat very little, remaining inactive on the bottom of the pond. The surface of the pond may freeze over in these months. If the pond is not deep enough, the fish may freeze at the bottom. A Koi pond must be a minimum of two feet deep to allow an ice-free “Warm zone” at the bottom of your pond where the Koi are kept safe from freezing temperatures. For larger Koi, it is recommended to have three feet of water depth.
Koi have several natural predators, including Herons, Fishers, and Minks. Other predators may also be present in nearby areas. These predators can be combated by building refuges in your pond. A fish cave that is inaccessible from the top is a great way to provide protection. Using rocks to create safety coves from swimming predators is another way to provide cover for the Koi.
Rocks and Gravel
Koi are bottom feeders and continuously search the pond floor for food. Building a Koi pond with rock walls and a gravel bottom will give habitat for many strains of algae and microorganisms for Koi to eat. When not under stress, Koi will rummage through the gravel substrate to find nutrition growing in the pond. A healthy ecosystem can produce much of the food the fish population needs to survive.
Without proper circulation, the pond water will become stagnant. Stagnation can lead to murky water, which hides the fish from view. Also, when water stagnates, it will lead to more algal blooms and unwanted insect breeding. If your pond doesn’t properly circulate, gases and minerals in the water can become toxic to fish, causing death in many cases.
How Much Does a Koi Pond Cost?
Koi ponds vary greatly in size, from a very small pond for several fish, to a pond large enough to support a hundred fish. A large pond can even be designed for swimming, if desired. Let’s look at several common pond sizes and the average cost for each.
Various project circumstances can alter price, and there are many additional features that can be added to a pond, so the following are some basic pricing guidelines.
Small Koi pond
A small Koi pond will be roughly 6 to 8 feet wide and 8 to 12 feet long. Small Koi ponds will only be 2 feet deep. Most small Koi ponds will hold between 500 to 1,000 gallons of water and can support up to 8 medium-sized fish. With added waterfalls or streams, a small Koi pond could cost between $6,000-$9,000.
Medium Koi pond
A medium pond can range from 10 to 12 feet wide and 14 to 16 feet long. These ponds are often 2 feet deep but can be deeper. Digging a deeper pond will cost more and will greatly increase the volume of your pond and the amount of fish the pond can sustain. A medium Koi pond with an average depth of 2 feet can support a dozen fish. Medium Koi ponds can cost between $15,000 to $25,000. The depth of the pond, along with waterfalls and additional components, contribute to the variability in price.
Large Koi pond
There isn’t a real limit for how large a Koi pond can be. A large Koi pond can be 15 feet wide by 20 feet long. Large Koi ponds should be constructed 3 feet deep, and usually hold at least 3,000 gallons of water. These habitats can support the largest Koi. Twenty to thirty fish can live in a pond this size. A large Koi pond can cost around $30,000.
Wondering what type of Koi pond is right for you?
If you’re interested in finding a Koi pond to fit your property and budget, contact us for a consultation. Looking for more inspiration or koi pond ideas? Check out our koi pond photo gallery.
Leaks — every pond and waterfall owner's nightmare. But the truth is that a leaking water feature can be fixed. Finding a leak in a rubber liner pond is usually the most challenging part.
Four possible reasons your pond/waterfall is leaking:
Your approach to leak detection must be methodical, otherwise you might misdiagnose the cause and possibly waste a lot of time and money.
Water loss in a pond or waterfall usually can be attributed to the following four causes:
To locate where and how your water feature is leaking, it is important to have a methodical approach. Rushing to fix a possible cause could be costly and ineffective.
Step 1: Measure and record water loss over a consistent time period.
The first step in identifying a leak is to record how much water your feature is losing in an easily observable timeframe. To begin, measure water loss while your feature is running. It is important to measure water loss from an accurate and predictable point. Watching the waterline on a rock or observing the apparent rate of a waterfall are not predictable measurements. If your pond has any type of autofill or fill valve that adds water to your pond, turn it off. Do not add any water to the water feature while measuring water loss!
The best way to observe water loss is by measuring from a set point. Inside the pump vault, or skimmer is usually the best place to do this. Observing water loss over 6-, 12-, or 24-hour periods is usually most effective. Write down your measurements! Try to be as accurate as possible with your measurements; knowing that your pond lost “about an inch” will not help you or a service technician when trying to find leaks.
Once you have a reliable rate of water loss, we can compare your water loss rates to evaporation rates. Evaporation during summer months can claim a large amount of water causing apparent “leaks.” Under normal conditions, a running water feature will lose between ½%-1% of the running water flow per hour in a day. If your pump pushes 3,000 gallons an hour, your water feature can lose between 15-30 gallons per day. A flow meter can be used to calculate how much water is required to refill the pond to its original level. If your pond is losing more water than average daily evaporation rates, it is time to start searching for leaks.
Step 2: Search for edge leaks around the stream and pond areas.
After ruling out evaporation, edge leaks are the next area to search. Edge leaks will occur most often in stream or waterfall areas. Look for damp or wet soil around the edges of your water feature. If you do find a place where water is running or leeching over the liner, this berm will need to be reworked. There should be enough extra liner buried in the soil to rebuild the edge high enough so that water cannot escape. Areas behind larger rocks or boulders can be prime locations for leaks if the liner gets pushed down behind them. If you can find and fix an edge leak on your water feature, you can begin measuring water loss again. If you don’t observe water loss after fixing the edge leak, congratulations! You have eliminated your leak.
If you complete these steps and your water feature is still losing water, it is time to shift attention to the pond (or basin, if you have a disappearing waterfall).
Step 3: Test the pond for leaks.
Turn off all pumps running the stream or waterfall and allow the pond to sit for a day. Carefully measure and observe the water level when the pumps are off and the water is resting. If the water loss is minimal or zero, this means that your leak is occurring in the stream or the plumbing. If your pond holds water, you are ready for the next step.
If the pond is losing water while it is not running, this probably means there is a puncture in the liner. Do not refill your pond. Allow the pond to drain until the water reaches a stable level (meaning the pond has drained to the level of the leak). If your pond drains completely, the puncture must be on the bottom. Take note of the water level before you begin searching the pond. If your pond is rock walled, this may require disassembling the rock walls and cleaning the liner in order to find the puncture.
Even a tiny puncture the size of the diameter of a pencil can drain over 100 gallons a day! Once the puncture is located, it will require a rubber liner patch kit. Follow the manufacturer’s requirements for using the patch kit. DO NOT attempt to seal the liner with any type of silicon, foam, or sealer. Most of these products are not fish safe and do not provide a permanent fix.
Step 4: Test the stream for leaks.
To find a stream liner puncture or hole, the water must continue to flow. To isolate the area of the leak, run a temporary pipeline from your pump to the first waterfall or shelf of your stream. Allow water to run normally through your temporary line for at least 24 hours. During this time, carefully monitor the water level. If you don’t observe any water loss, you can safely conclude that the bottom shelf or waterfall is leak-free.
Now, move your temporary pipeline upstream to the next waterfall or shelf. Again, monitor water levels while running the pump through this temporary line. Repeat this process step by step up the stream until you find an area that is losing water. Like a pond liner leak, locating a stream liner leak might require moving rocks and gravel. Use only an appropriate liner patch kit to seal and fix any punctures.
Step 5: Test for plumbing leaks.
If you have tested all areas of your stream and pond and are still recording significant water loss, your feature probably has a plumbing leak.
You might not see any wet areas on the surface since plumbing lines are usually buried at least several inches underground. While the pumps are pushing water through the line, dig along the pipe from the skimmer toward the head of the stream. Once you locate the leak, cut out the compromised section of pipe and replace it. DO NOT attempt to wrap the leaking pipe or fixture in tape, plastic, or any type of sealer. These fixes are meant only for temporary leak control and should only be used in an emergency until a proper repair can be completed.
Get Professional Help for Your Water Feature Leak
If you are still unable to locate or repair a leak in your water feature, or if you would like a professional to handle your leak dilemma, call us at 814-204-2721 or contact us online.
Weston has been working at Tussey since 2007, starting as a laborer on the crews. Today he works as a foreman on one of the crews during the landscaping season, as well as our marketing director at Tussey.