With a soft sponge and clear water, no products. A layer of algae on the walls comes off easily while it is young. Avoid any detergent: the tank hosts a bacterial balance that a household product destroys in one go.

Raised above-ground fish pond – preformed elevated pond for koi and ornamental fish in the garden

Above-ground pond overview – easy install without earthworks for garden pond

Above-ground pond detailed view – reinforced frame and watertight liner for outdoor aquaponics

Above-ground pond in situ – raised pond for keeping fish and aquatic plants

Above-ground fish pond

Name: Above-ground fish pond
SKU: 8484df70-356c-44d4-84d3-17b9e7017006
Price: 162.9 EUR
Availability: InStock

162,90 €

54,30 € × 3 with no fees Klarna.

This collapsible round tank in reinforced PVC fabric, stretched over a frame of rigid tubes, is assembled by hand on a flat surface, with no excavation or tools, and drains through an integrated tap. Its three diameters, from 1.5 to 2.4 m at a height of 1 m, are used to rear fish in aquaponics without digging.

Ref. 8484df70-356c-44d4-84d3-17b9e7017006·Above-ground pond

Dimensions : 1.5 × 1 m

1.5 × 1 m

2 × 1 m

2.4 × 1 m

Customer support 7 days a week by email

Delivery within 2 to 15 business days

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The summary

The volume: roughly 1,750, 3,100 or 4,500 litres filled to the brim, the figure that drives everything else in the setup.
What it saves you: digging. The tank is assembled by hand on a slab, a patio or firmly compacted lawn.
The liner: reinforced, UV-resistant PVC, stretched over a frame of rigid tubes.
The drain: a built-in tap, for partial water changes without a siphon or a bucket.
Before the fish: a biological start-up of several weeks, with the pump and air pump running.
How it arrives: folded, in one compact parcel, and it folds down the same way out of season.

Foldable round framed tank, 1.5 to 2.4 m in diameter, with drain

The above-ground fish pond is a round, collapsible tank made of reinforced PVC fabric, stretched over a frame of rigid tubes. It is assembled by hand on a flat surface, without digging, in diameters of 1.5, 2 or 2.4 m and a height of 1 m. Its volume reaches approximately 1,750, 3,100 or 4,500 litres, and a built-in tap allows draining.

This tank lets you raise fish without any digging. It has a reinforced PVC liner stretched over a frame of rigid tubes, assembled by hand on any flat surface, in 1.5, 2 or 2.4 m diameter and 1 m high. Its round shape removes the dead corners where deposits build up, and because it folds away it can be stored out of season.

🐟 A tank with no excavation

Find a flat surface

Choose a slab, a patio or compacted lawn. A slope of a few centimetres shows up as soon as the water goes in.

Put protection in place

A geotextile or a mat slips under the liner, against the gravel and roots.

Assemble the frame

The tubes fit together by hand, with no tools and no fixings to tighten.

Fill slowly

The cloth presses flat and settles into place by itself as the level rises.

🧭 Choosing the volume

Volume does not only decide the number of fish, it decides stability. A large volume of water changes temperature slowly, absorbs a feeding mistake without sudden swings in the parameters and tolerates a missed feed, whereas a small volume reacts quickly to the slightest error. That is why a beginner is better off going generous rather than tight, with the 1.5 m tank suiting a terrace set-up and the 2.4 m tank a project that will supply several grow beds.

Also consider the actual space, because a tank 2.4 m in diameter needs a clear circle, plus a walkway all around it for maintenance. And think about the weight, which is not that of the tank but that of the water, since a litre weighs a kilo and the 2.4 m version holds about 4.5 tonnes spread over its footprint. On a terrace, on a wooden floor or on an upper storey, this load should be checked before purchase and not after filling. Once filled with water, the tank cannot be moved, so the location is chosen for several seasons.

Pump and air pump from the first fill

An outdoor circulation pump sends the water from the tank to your grow beds, while a pond aerator maintains the dissolved oxygen that fish and bacteria need. Both start up as soon as the system is first filled and run throughout the biological start-up, so the bacteria are already established by the time your fish arrive. An ammonia test and a nitrite test then show you how far along that start-up is.

Floor loading and the first fill

When full, the tank weighs nearly 1.8 tonnes at 1.5 m in diameter and about 4.5 tonnes at 2.4 m. Check the load-bearing capacity of your base before choosing the location, and rule out balconies and upper-floor boards outright without technical advice. Then fill slowly, checking that it stays level as you go, because a tank filled off-level stays off-level and the liner then works constantly on the high side. Finally, remove anything lying under the liner before filling, since nothing will be accessible afterwards.

🚿 The drain tap

The partial water change is the most regular task on a fish pond, and when it is done with a bucket or a siphon, it tends to get put off. Here, you open a tap, let the required volume drain away, and top the level back up. The water that comes out is not wasted, since, being rich in nitrates, it works very well on a flower bed or a vegetable patch in open ground. Top up slowly and with water at a similar temperature, because it is the temperature difference during refilling, far more than the water change itself, that stresses your fish. A change of about a tenth of the volume per week suits most installations, and can then be adjusted according to what a nitrate test tells you.

🌿 The heart of an aquaponic system

In a system where fish, bacteria and plants share the same water, this tank is the starting point of the circuit. The pump draws water from it towards the grow beds, and the water returns to it, with its nitrates depleted by the crops. Before putting any fish in, you need to let the bacteria establish themselves that convert ammoniacal nitrogen into nitrite and then into nitrate. This is the nitrogen cycle, and it takes several weeks, during which the pump and the air pump run on water with no inhabitants. Add your first fish only when ammonia and nitrite have both dropped back to zero while nitrate is rising, and not before. A rushed start costs you fish, and it is a common mistake on a first system.

🔄 What the round shape changes

In a round tank, the water circulates instead of stagnating in corners, and debris collects in the centre rather than spreading everywhere, which makes cleaning much easier than in a rectangular tank. Direct the water return along the wall rather than towards the centre, and this circular movement sustains itself, without asking more of the pump. Finally, make the most of each partial water change to run a soft sponge over the wall at water level, where deposits build up first and where they are most visible. You will thus keep the wall clean without ever having to empty the tank completely.

❄️ Off season

A collapsible tank can be taken apart, and that is its other advantage over a dug pond. If you are not overwintering fish, empty it in autumn, let the fabric dry completely before folding it, and store it away from frost and rodents, which readily gnaw at PVC folded up in a garden shed. If fish spend the winter in it, the situation changes, because an above-ground volume cools far faster than a buried pond and can freeze to a considerable depth. In that case provide insulation around the sides and an air point kept free of ice, or move your fish elsewhere for the cold season. You can also run this tank for the season only, from April to October, which simplifies everything and significantly extends the life of the fabric.

Technical specifications

The essentials

Volume filled to the brim: Approximately 1,750, 3,100 or 4,500 LFor diameters of 1.5, 2 and 2.4 m. The larger the volume, the more slowly the temperature changes.
Diameters: 1.5, 2 and 2.4 mAllow for a clear path all the way round as well: maintenance is done from the edge.
Height: 1 mIt is also the height the pump will have to lift the water.
Canvas: UV-resistant reinforced PVCSmooth inner surface, with no edges where a fish could be injured.
Frame: Rigid push-fit tubesAssembled by hand, with no tools or screws.
Drain: Built-in tapPartial water changes are done without a siphon or a bucket.

To budget for separately

Circulation and aeration: An outdoor pump and an air pumpThey run from the start of the biological cycling, well before the first fish arrives.
Soil protection: Geotextile or thick mattingIt sits between the fabric and the ground, up against the gravel and the roots.

In the box

1 reinforced PVC tank liner, in the chosen size, with its drain valve already fitted.
1 set of push-fit frame tubes.

Diameters, height, fabric type and presence of a tap taken from the manufacturer's description on 20/09/2026. Volumes calculated for a tank filled to the brim.

Estimate your
delivery time

The tank is shipped folded, with its set of tubes: the parcel is compact but dense. Plan to have two people to carry it to its final position, and decide on that position before filling with water. Exact shipping costs are displayed at checkout once your address has been entered.

Frequently asked questions

10 questions

6 key questions, 10 in the detailed view

Which volume should I choose to start with?

Can it be installed on a terrace?

Does the tank need protection underneath?

How long should I wait before adding the fish?

Does the sheeting withstand sunlight?

How do you do a partial water change?

Open the tap and let a portion of the volume drain away, not all of it.
Direct this water to a flower bed or a vegetable plot: it is rich in nitrates.
Top the water back up slowly, using water at a similar temperature.
Close the tap and check the temperature over the next few hours.
Allow roughly a tenth of the volume per week, then adjust this rate according to what a nitrate test tells you.

What to do with the tank in winter?

Does the round shape make any difference?

Can it be drilled to fit pipework?

How do you clean it?

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Above-ground fish pond

The summary