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Creating a koi pond - 4 important tips

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Once held by the nobles as status symbols, kois are now something for every garden pond. However, only if this fulfills some important requirements.

It is best to create a koi pond near the house

Garden ponds are extremely popular, but the absolute crowning glory is of course a koi pond, and it fits particularly well in a Japanese garden. If you decide on such a highlight on your property, then you have to be aware that it is not just a proud price. Very special requirements must also be met. Kois are after all very expensive fish and for that reason alone you should pay attention to keeping them healthy.

The animals grow extremely quickly and can be up to 80 centimeters long. They also reach an age of over 50 years, so you should be very sure that you want to maintain this hobby for a long time. If the decision for the pond has been made, then it only needs to be created under certain conditions.

Tips for creating a koi pond

➤ Tip 1 - The ideal location for the koi pond:

First of all, you need to find the right place for the pond. In order to be able to observe the animals as well as possible, a location near the house is of course ideal. If you have a terrace, the area in front of it is the most suitable. A high-quality technology is also required for the koi pond and you can then store it in the house, which also greatly simplifies maintenance and care.

The fish originally come from Japan, and there it is even the case that part of the pond reaches into the house. This way the fish have a warmer area and you can comfortably take care of your animals even in bad weather. Of course, this is associated with an enormous cost and the implementation is not easy. It should only be an interesting suggestion if you are planning to build a new house, for example.

Many fear that the pond next to the house will attract swarms of mosquitoes in summer (reading tip: effective home remedy for mosquitoes). Although this is quite possible, they are also eaten by the fish. Due to the proximity to the house, the natural predators of the koi can be kept at a distance, as they tend to avoid people. In addition, the building can also cast shadows on the pond, which is particularly important because the koi pond should always have shady and sunny areas.

➤ Tip 2 - The dimensions of the koi pond:

➥ Minimum volume:

Kois are very big fish. In order to keep it species-appropriate, it also needs a lot of space. The pond must therefore have a certain minimum volume. It is best to calculate the total volume according to the number of fish that you want to use later. How to do it:

For a single koi, a minimum of 5,000 liters of water is expected. But since you don't keep Kois alone (at least 5 are recommended), the pond must of course be significantly larger. For each additional fish, the volume increases by 1,000 liters. If you intend to keep 10 animals, your koi pond should have a volume of at least 15,000 liters. These are the minimum requirements, bigger is always better, of course.

➥ Shape / size / depth:

An elongated shape is ideal. The ideal size would be 6 x 3 meters, which corresponds to an area of ​​18 square meters. If you then plan a depth of 150 centimeters, you would have a total volume of 25,000 liters. Thus, the pond has a fairly large capacity with a relatively small footprint.

The depth should be the same throughout, because you don't need to plan different planting zones for the koi pond. However, a depth of two meters would be desirable. This is the optimum so that the fish can safely overwinter.

➤ Tip 3 - The pond for the koi pond:

When installing the pond basin, the most important thing is the subsoil. If this is nice and firm, so it consists of clay or clay, then a pond liner with a thickness of 1 millimeter should be sufficient. It is recommended that you have the film cut to the required size at the excavated point. This should not have any folds when laid out, because not only dirt but also germs can settle there later. This is exactly why you should first cut the film in the corners and then weld these areas again.

If the ground in your garden is not firm enough, you have to pour the concrete pool, otherwise you will not have sufficient stability. Given the size, you cannot really do this work yourself. You must therefore commission a specialist company to do this. After the pond has been let in, it is then also lined with foil.

A pond pool made of plastic reinforced with glass fibers, the so-called GRP, is expensive, but the most durable and hard-wearing. The great thing about it: Specialist companies can always model such pools according to the customer's specifications.

➤ Tip 4 - The right technique for the koi pond:

➥ Filter / pond pump:

Since the koi are very expensive, you have to do everything to keep them healthy. Of course, that starts with the quality of the water, which must always be the same. The basis for this is a high quality filter. Since the animals pollute the water very heavily, the filter should therefore also be powerful. When buying a filter, you should choose a larger model, even if a smaller one would be sufficient for the pond volume. Otherwise you might have to upgrade later, which will be complex and expensive.

The pond pump is always placed at the end of the filter. She can then lead the clean water back into the koi pond.

➥ Surface suction cups / floor runs:

A surface vacuum (also called a skimmer) and a few floor runners have proven particularly useful for koi ponds. These transport the polluted water into a mechanical and then into a biological filter. The biological filter should definitely have ventilation, because this is the only way for the bacteria to have enough oxygen in it to do its job properly.

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