UV Clear 7-60W sterilizer – UV-C lamp for clarifying pond and aquaponic water

UV Clear sterilizer side view – inline installation to eliminate algae and bacteria

EHEIM Clear UVC pond UV steriliser, 7 to 60 W

Name: EHEIM Clear UVC pond UV steriliser, 7 to 60 W
Brand: EHEIM
SKU: 5300010
Availability: InStock

$68.00

$22.66 × 3 with no fees Klarna.

This UV-C clarifier is fitted in line on a pond circuit, against green water and suspended algae. Its seven power ratings treat 7,000 to 60,000 litres without fish, a volume that is halved with fish and quartered with koi.

Ref. 5300010·UV steriliser

Model : Uvc-7

UVC-7

UVC-9

UVC-11

UVC-18

UVC-24

UVC-36

UVC-60

Customer support 7 days a week by email

Delivery within 2 to 15 business days

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The summary

What you receive: the unit with its lamp and quartz tube, its nozzles and instructions.
The figure that decides: the volume treated is divided by four as soon as there are koi.
How to choose: seven power ratings, from 7,000 to 60,000 litres without fish.
What effort each year: one lamp to replace per season, and the quartz tube to wipe clean.
What fittings: half-inch to one inch up to 18 W, one inch to one and a half inch above that.
Warranty and power supply: 3-year manufacturer's warranty, 5 m cable across the whole range.

A UV-C clarifier chosen according to the pond's stocking as much as its volume

When a pond turns green in spring, the algae that cloud the water are single-celled and pass straight through the filter foams. This clarifier is installed in line on the circuit, after the pump, before or after the filter, and treats the water passing through it with UV-C radiation. Seven power ratings cover 7 to 60 W, and you choose yours according to the stocking as much as the volume. The guide to green pond water places this treatment among the other options.

🟢 The volume depends on your fish

The volume that a given unit can treat depends on what lives in the pond. With no fish at all, the 7 W treats 7,000 litres and the 60 W treats 60,000; with fish, these volumes are halved, and with koi they are divided by four, giving 1,800 and 15,000 litres. A 10,000-litre pond stocked with koi therefore needs the 60 W model, whereas the 9 W is enough for the same volume without fish. Koi stir up the bottom, eat a lot and load the water with organic matter, which feeds the algae that the unit has to destroy.

That leaves the actual consumption, which exceeds the lamp's power rating on most models because of the ballast that drives the tube. The 7 W uses 9 W at the meter, the 11 W uses 14 and the 24 W uses 26, while the 18 W and the 60 W show the same figure for the lamp and for the unit. Over a season of 6 months of continuous running, the 7 W therefore needs about 39 kWh and the 60 W about 263 kWh. The cable is 5 m long across the whole range, so the unit must be placed within 5 m of an outdoor socket.

🔁 When to replace your lamp

A UV-C lamp wears out without going out. It keeps emitting visible light long after it has stopped being germicidal, and nothing on the unit will tell you when that happens. Replacement should therefore be done on a schedule, at the start of the season, on a lifespan of around 8,000 hours. While you have it dismantled, wipe the quartz tube, on which limescale deposits a film that blocks the radiation before it reaches the water.

UV-C radiation and inlet pressure

UV-C radiation is dangerous to the eyes and skin. Always unplug the unit before opening it, and never look at the lamp while it is lit. On the 7 to 18 W models, the water pressure at the clarifier inlet must not exceed 0.4 bar.

Keep a spare lamp for the spring

The EHEIM replacement UV-C lamp is available in all seven wattages of the range. Order it before the season restarts, so you can replace the worn tube on the day you set the circuit running again, rather than waiting for the water to turn green. The clarifier then restarts with its full germicidal power from the first warm days, when single-celled algae multiply fastest.

🌱 The clarifier in aquaponics

In a pond connected to crops, the UV light only acts on the water that passes through the unit. The nitrifying bacteria, which live on the filter media and on the walls, never enter the treatment chamber, so the conversion of ammonium to nitrate carries on while the water clears. However, ultraviolet light breaks down the chelated iron that you supply to the plants: switch the clarifier off for the 6 to 12 hours after each dose, long enough for the roots to take up the iron. With koi, choose the unit using the volume given for a koi pond, the lowest of the three, and the guide on koi carp in aquaponics explains why this fish loads the water so heavily.

📦 Fittings and carton contents

The box contains the clarifier assembled with its lamp and quartz tube in place, its connection ends and its instructions. The ends cover half an inch to one inch on the 7 to 18 W models, and one inch to one and a half inches on the 24, 36 and 60 W ones. Measure the diameter of your circuit before ordering: it is the only dimension that decides whether the unit can be installed at your home without an adapter. The 7 to 18 W models are rated IPX4.

Technical specifications

The essentials

Device type: UV-C pond clarifierFits in line on the circuit, after the pump.
Power ratings: 7 to 60 WSeven models, chosen according to volume and stocking.
Cable length: 5 mIdentical across all seven models, and often the constraint when deciding where to install it.
Lamp lifespan: Around 8,000 hoursGermicidal power drops off before the tube goes out.

Litres treated, 7 to 18 W models

7 W model: 7,000 L, or 1,800 with koi3,500 L with other fish. The unit uses 9 W and withstands 0.4 bar.
9 W model: 10,000 L, or 2,500 with koi5,000 L with other fish. The unit uses 11 W.
11 W model: 15,000 L, or 3,800 with koi7,500 L with other fish. The unit uses 14 W.
18 W model: 20,000 L, or 5,000 with koi10,000 L with other fish. Lamp and unit are both rated at 18 W.

Litres treated, 24 to 60 W models

24 W model: 26,000 L, or 6,500 with koi13,000 L with other fish. The unit uses 26 W.
36 W model: 36,000 L, or 9,000 with koi18,000 L with other fish. The unit uses 38 W.
60 W model: 60,000 L, or 15,000 with koi30,000 L with other fish. Lamp and unit are both rated at 60 W.
Connection and housing: 1, 1 1/4 or 1 1/2 inchHousing measuring 178 x 496 x 160 mm on these three models.

To budget for separately

Replacement lamp: A new tube each season
Water circulation: A pump that feeds the circuit

6 further specifications are available in the detailed view.

In the box

1 assembled clarifier, with its UV-C lamp and quartz tube
1 set of connector ends to be cut to the diameter of the pipe
1 power cable of 5 m, fixed to the unit
1 installation leaflet

Pond volumes, lamp and unit power ratings, fittings and dimensions: manufacturer's technical data sheets and instructions, taken on 20/09/2026. The IPX4 rating and the pressure of 0.4 bar are published for the 7 to 18 W models.

Pond clarifier or aquarium steriliser?

Two UV-C units from the range against green water, sized according to two different approaches.

Outdoor pond or indoor tank? Both appliances do the same job on green water. They are not sized in the same way.

	Maximum lamp power (W)	Minimum lamp power (W)	Choice of several power ratings	Designed for the garden pond	Designed for the aquarium	Sizing guided by the stocking level	Price
Recommended EHEIM Clear UVC pond UV steriliser, 7 to 60 WYour choice	60 W	7 W	7	Yes	No	Yes	$68.00
Aquarium UV steriliser, 5 to 36 WYour choice	36 W	5 W	4	Yes	Yes	No	$115.00

EHEIM Clear UVC pond UV steriliser, 7 to 60 WRecommended

Power

Maximum lamp power (W)60 W

Minimum lamp power (W)7 W

Choice of several power ratings7

Intended use

Designed for the garden pondYes

Designed for the aquariumNo

Sizing guided by the stocking levelYes

Aquarium UV steriliser, 5 to 36 W

Power

Maximum lamp power (W)36 W

Minimum lamp power (W)5 W

Choice of several power ratings4

Intended use

Designed for the garden pondYes

Designed for the aquariumYes

Sizing guided by the stocking levelNo

Lamp wattages, volumes treated and uses taken on 20/09/2026 from the technical datasheets of the two manufacturers.

Estimate your
delivery time

Long parcel, protected for the quartz tube. Dispatched within 48 h by Colissimo or Chronopost to your home, as you choose at checkout. The exact cost depends on the model and the option chosen.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

My pond holds 10,000 litres, which model should I choose?

The answer depends entirely on what is swimming in it.

Your pond	Model
10,000 L without fish	9 W
10,000 L with fish	18 W
10,000 L with koi	60 W

The same volume therefore calls for three different units.

Why does a koi pond need four times as much?

Where is the device placed in the circuit?

The lamp still lights up, should it be replaced?

How much does it really use on the meter?

What water pressure can it withstand?

Which fittings for each model?

Are the 7 W and the 9 W equivalent?

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EHEIM Clear UVC pond UV steriliser, 7 to 60 W

The summary