EHEIM GLOWUVC replacement UV-C tube in the short format, two parallel tubes and a four-pin base

EHEIM GLOWUVC replacement UV-C tube in the long format for 24 to 60 W clarifiers

Orange box of the EHEIM GLOWUVC replacement UV-C tube, standing upright

EHEIM Clear UVC pond clarifier with the UV-C tube that fits inside it, shown in front of the unit

EHEIM replacement UV-C bulb for Clear UVC, 7 to 60 W

Name: EHEIM replacement UV-C bulb for Clear UVC, 7 to 60 W
Brand: EHEIM
SKU: 4100010
Availability: InStock

24,90 €

8,30 € × 3 with no fees Klarna.

This replacement UV-C tube fits the Clear UVC pond clarifiers, in seven power ratings from 7 to 60 W. It should be replaced after 8,000 hours of use, and the power rating to order is shown on your unit's housing.

Ref. 4100010·UV lamp

Power : 7w

11w

18w

24w

36w

60w

Customer support 7 days a week by email

Delivery within 2 to 15 business days

100 % secure payment

The summary

What you receive: a replacement UV-C tube, in one of seven power ratings from 7 to 60 W.
When to change it: after 8,000 hours of service, before the water turns green again.
How to choose: the power rating is read from the clarifier's housing, never from the volume of the pond.
What you need to know: handle the glass with a soft cloth, and take the used tube to a recycling centre.

Germicidal tube for Clear UVC pond clarifiers, to be replaced after 8,000 hours

This replacement UV-C tube is the only wear part of a Clear UVC pond clarifier. It produces the radiation that stops suspended algae from multiplying, and it wears out while the rest of the unit stays intact. Seven wattages cover the seven models in the range, from 7 to 60 W, and you order the one that matches the unit sitting at the edge of your pond or mounted on your filter.

🔦 What the tube emits

The tube lights up inside a glass sleeve, around which the water circulates continuously. The UV-C radiation passes through this glass and breaks the DNA of the cells passing in front of it, so that single-celled algae can no longer divide. This is the mechanism that clears the green water in your pond, and it is also the first thing to weaken. After 8,000 hours of service, the germicidal output drops sharply even though the tube still lights up normally. You should therefore replace the tube when it reaches its service life, never when it goes out. The guide on green pond water places this replacement among the other ways of getting clear water.

🎯 Which power for which model

Clear UVC-7 and UVC-9

The 7 W and 9 W tubes are fitted in the two smallest housings, designed for 7,000 and 10,000 litres of pond without fish.

Clear UVC-11 and UVC-18

The 11 and 18 W tubes cover 15,000 and 20,000 litres without fish, and 3,800 and 5,000 litres when koi are in the pond.

Clear UVC-24 and UVC-36

The 24 and 36 W tubes fit the long housings, designed for 26,000 and 36,000 litres of pond without fish.

Clear UVC-60

The 60 W tube is the most powerful in the range. It is fitted to the unit designed for 60,000 litres without fish and 15,000 litres with koi.

The clarifier that takes this tube

If you are equipping a new pond, the 7 to 60 W pond UV steriliser is the one these seven tubes are designed for, model by model. You choose the wattage according to the pond's volume and what lives in it, from 7 W for a small pond to 60 W for a large body of water, and its replacement tube is then ordered in the same wattage, after 8,000 hours of service.

🧩 The LOOP and LOOPpro filters

Pond filters with an integrated clarifier also take these tubes, since their ultraviolet unit is a Clear UVC. On a LOOP pond filter, the 5000 model takes the 7 W tube and the 7000 model the 9 W one, while the 10000 and 15000 models share the 11 W tube. On a LOOPpro pond filter, the wattage follows the size of the tank: 9 W on the 6000, 11 W on the 8000 and 18 W on the 12000, then 24, 36 and 60 W on the three largest models. In every case, the number that follows "Clear UVC" on the clarifier housing gives the wattage to order, which saves you from searching for the kit reference.

❄️ The tube during winter

A pond clarifier does not run all year round, since the unit is put away frost-free as soon as the cold season arrives. The tube does not wear out during this shutdown, so it is at the spring restart that you judge its condition, at the very moment when suspended algae start growing again. The pond algae guide describes this period. If your pond also supplies grow beds, keep in mind that the clarifier only acts on the water that passes through it: its winter shutdown does not affect the bacteria of the nitrogen cycle, which are attached to the filter media.

Technical specifications

The tube

Power: 7 to 60 WPower is read off the appliance; it cannot be deduced from the volume of water.
Service life: 8,000 hoursThe germicidal radiation weakens sharply beyond this length of time.
Reference by power: 4100010 to 4106010Each power rating has its own, printed on the tube to be replaced.
Mercury: What's in the tubeHandle the tube with a soft cloth and take it to a recycling centre for disposal.

The unit that receives it

Compatible appliances: Clear UVC-7 to Clear UVC-60Including the clarifiers fitted to LOOP and LOOPpro filters.
Pond without fish: 7,000 to 60,000 LRange covered by the seven units, from 7 W to 60 W.
Pond with koi: 1,800 to 15,000 LKoi load the water, so the unit treats a smaller volume.
Fittings: Half an inch to an inch and a halfThe 7 to 18 W models stop at the inch, the 24 to 60 W ones start at the inch.

In the box

1 spare UV-C tube, in the power rating you choose

EHEIM values: CLEAR UVC-7 to UVC-18 and UVC-24 to UVC-60 instructions, product pages for the GLOWUVC tubes and the LOOP and LOOPpro filters, taken on 20/09/2026 and 11/10/2026.

The tube of your Clear UVC, or that of a reeflexUV?

Two families of UV-C tubes from the catalogue, for two units that do not connect in the same way.

Pond tube or aquarium tube? The two families look alike and cannot be installed in place of one another. The housing decides.

	Housing marking	Connecting the unit	Treated medium	Stated volume	Highest tube power (W)	Choice of several power ratings	Service life (h)	Price
Recommended EHEIM replacement UV-C bulb for Clear UVC, 7 to 60 WYour choice	Clear UVC	Screw-on ends, from half an inch to an inch and a half	Garden pond, outdoors	Pond, up to 60,000 L without fish	60 W	7	8000 h	24,90 €
EHEIM replacement UV-C bulb for reeflexUV, 7 to 24 WYour choice	reeflexUV	Flexible pipe, 12/16 or 16/22 mm	Indoor aquarium	Aquarium, from 80 to 2,000 L	24 W	5	8000 h	24,90 €

EHEIM replacement UV-C bulb for Clear UVC, 7 to 60 WRecommended

The unit that holds the tube

Housing markingClear UVC

Connecting the unitScrew-on ends, from half an inch to an inch and a half

Treated mediumGarden pond, outdoors

Stated volumePond, up to 60,000 L without fish

The tube

Highest tube power (W)60 W

Choice of several power ratings7

Service life (h)8000 h

EHEIM replacement UV-C bulb for reeflexUV, 7 to 24 W

The unit that holds the tube

Housing markingreeflexUV

Connecting the unitFlexible pipe, 12/16 or 16/22 mm

Treated mediumIndoor aquarium

Stated volumeAquarium, from 80 to 2,000 L

The tube

Highest tube power (W)24 W

Choice of several power ratings5

Service life (h)8000 h

Compatibilities, power ratings and service life recorded on 20/09/2026 from the instructions and the EHEIM spare parts shop.

Estimate your
delivery time

Fragile glass tube, wedged in a protective parcel. Dispatched within 48 h by Colissimo or Chronopost home delivery, your choice at checkout. The exact cost depends on the method chosen.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

What power rating should I order for my unit?

The water is turning green again while the unit is running: where does it come from?

Two causes come up again and again, and they should be checked in this order.

The glass sleeve has become scaled or fouled, and the radiation no longer reaches the water. It can be removed and cleaned with an ordinary household glass cleaner.
The tube has passed its 8,000 hours. It still lights up, but its germicidal power is no longer sufficient.

If the glass is clean and the tube is new, the cause lies somewhere other than the clarifier.

Does anything else need cleaning during the replacement?

How should you hold the tube during assembly?

How can you tell the new tube is working?

Can the clarifier run with the pump switched off?

What happens to the used tube?

Will this tube fit an aquarium steriliser?

Let us talk about your project

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EHEIM replacement UV-C bulb for Clear UVC, 7 to 60 W

The summary