JBL PROCRISTAL UV-C Compact plus 36 W
Compact UV-C water clarifier 36 W against water cloudiness

  • Crystal-clear and healthy water : 36 W UV-C water clarifier for the quick and efficient elimination of greenish and whitish cloudiness in freshwater and marine aquariums and in garden ponds
  • Space-saving assembly: connect to external filter or separate pump. Inlet and outlet are positioned for practical use. Shortest Installation length: 61 cm
  • Partial sterilisation for aquariums up to 3000 litres (pump max. 1000 l/h) /15,000 l pond (pump max. 4000 l/h), against floating algae up to 800 l in the aquarium (pump max. 1000 l/h) / pond up to 8000 l (pump max. 4000 l/h)
  • TÜV tested, safety switch: UV-C bulb switches off automatically when the device is opened. Sturdy, UV-resistant casing, 2- glass-cylinder design
  • Package contents: complete UV-C device, 5 m cable, UV-C bulb 36 W, socket: 2G11, wall mount, V2A screws, nozzle hose connections for 12 - 40 mm hoses. Guarantee: 2 years (+2 years upon registration of the product)
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Price: 256,89 €
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Product information

Crystal-clear and healthy water
Poor light conditions, over-fertilisation or even a surplus of nutrients can have negative effects on the aquarium water and may promote algae growth. Floating algae lead to green, bacteria to white clouding. The JBL water clarifier eliminates cloudiness caused by bacteria and floating algae. The aquarium water passes through the sturdy, UV-resistant casing of the clarifier. The UV radiation kills off bacteria, other germs and floating algae as the water passes through. The efficiency of this UV-C water clarifier is particularly high, as the glass bulb is surrounded by a polished, reflective stainless steel foil, which reflects the UV-C radiation and thus doubles the efficiency. This can also help to eliminate persistent algae, such as thread algae, since their spores are also largely killed off.

No harmful side effects
No change of the water values / no negative influence on the essential cleansing bacteria in the filter.

Easy to install
Connect the water clarifier to the external filter or a separate water pump. Thanks to the 90° elbow included in the pack any installation position is possible.

The JBL UV-C Water Clarifier is TÜV tested and has a safety switch for an automatic switch off when the device is opened. The casing is UV-resistant, consists of sturdy walls and has an LED light that indicates whether the UV-C bulb is switched on.

Difference to the previous model JBL ProCristal UV-C Compact:
The function indicator light is now mounted on the flat side of the electrical unit and the microswitch for the automatic switch-off of the burner when the housing is opened (if the plug has not been removed) has been replaced by a magnetic safety switch. This means that the electrical units of the previous models (Compact) do NOT fit the new ones (Compact Plus) and vice versa.


JBL PROCRISTAL UV-C Compact plus 36 W

Art. no.:
EAN Code:
36 W
56,5 cm
Volume packaging:
20 l
Gross weight:
3232 g
Net weight:
2696 g
Weight factor:
Packaging dimensions (l/h/w):
165/210/577 mm


Animal species: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Corals, Crayfish, Danions, Discus, Dwarf crayfish, Dwarf shrimps, Flowerhorn, Gobies, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Koi, Livebearers, Loaches, Mussels, Newts, Panchaxes, Rainbowfish, Snails, Spiny eels, Sturgeons, Tetra, Veiltails, freshwater butterflyfish
Animal size: For all animal sizes
Material: Plastic/glass/copper
Colour: green / black

Electronic label / illuminant

Mercury: No
Dimmable: No

Technical Data

power output in Watt:36 W
Height:141 mm
Length:642 mm
Width:246 mm
voltage:240 V
Are two seals on top of each other twice as tight?

The question itself sounds strange and the answer is not surprising. No, do not use two seals under any circumstances. If a seal is not tight, it may already have aged too much or be defective. Two seals on top of each other take up too much space and do not provide increased tightness, on the contrary. Therefore, replace a seal that does not work. By the way: with JBL SiliconeSpray you look after your seals and significantly improve their service life.

How often does the UV-C bulb need to be replaced?

How often a UV-C bulb needs to be replaced, for example in the JBL PROCRISTAL UV-C Compact plus units, depends on its operating system. After a maximum of 6000 - 8000 operating hours, the output will have dropped so far that a change is necessary. In the case of continuous operation (24 hours), a replacement will be necessary after 250 days. That’s why in ponds the bulb is best changed in spring while the technology is being restarted.

Is the UV-C bulb defective if it rattles and there is a small ball inside?

No, this bead consists of mercury and is absolutely necessary. The bulb is only defective if the ignition filament is torn.
After the lamp has been ignited, the temperature inside increases and liquefies this bead, creating mercury vapour. The resulting ionisation processes ensure the desired UV-C radiation to kill germs, bacteria and algae. Due to the mercury content, used UV-C bulbs may only be disposed of at appropriate collection points (e.g. for fluorescent tubes).

Why is combatting cloudiness less effective than partial sterilisation?

A partial sterilisation (against bacteria) is more effective than eliminating clouding caused by floating algae. Why? Because the cell structure of bacteria is quite simple. That’s why it is easier to destroy the cells of bacteria than those of algae.

How long does a UV-C device need to be in operation each day?

Without an onsite assessment we are unable to recommend how long your UV-C device needs to be in operation each day. For this we need to know the germ load and the regeneration level of the germ density in the aquarium. However based on values of our own experience we would recommend running the device for an absolute minimum of 12 h a day. A continuous operation is, however, better for the durability of the bulb.

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Blog (opinions & experiences)

Green water in the pond? JBL's PROCRISTAL UV-C helps - guaranteed

Unsightly and opaque green water colour in the pond (rarely in the aquarium) is caused by microscopic floating algae. There are two ways to combat these algae:

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JBL TV #49: Saving energy in the aquarium - reducing costs made easy

Yes, we can make energy savings in our aquarium, but not where most people think! In this video we show exactly where and how to save electricity costs.

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JBL TV #46: Clear view in the aquarium - Getting cloudy water clear

Biologist Heiko Blessin explains the causes of cloudy aquarium water and the ways to get it crystal clear again.

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Video: Replacing the UV lamp - Maintaining clear water in the pond and aquarium

With the help of a UV-C lamp, the water in the aquarium and pond becomes crystal clear and any cloudiness is eliminated within 24 hours. We will show you how easy it is to replace a UV-C burner.

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JBL TV #23: Cloudy water in the aquarium? These measures will help!

We’ll go through all the different types of cloudiness and discolouration, explaining how to treat each one.

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The JBL Intern - Aquariums in the Company

When I first entered the administrative offices, I was very impressed by the display aquariums in the boss's office and in the various conference rooms.

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Video: How do you install a UV-C water clarifier?

We will show you how easy it is to assemble a UV-C water clarifier.

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The cold weather’s here: get your pond ready

Here you’ll find everything you’ll need to know to keep your fish healthy during the winter and to give them a good start into the next season.

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I’ve had enough of this pond! Give up or save it?

Maybe you’ve felt like this: nothing works, the pond looks disastrous and you just don’t know what to do.

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Let’s Clear This Up: Cloudy Water in the Pond

Clear water is right at the top of almost all pond owners’ wish list.

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The Indispensible Partner for a Good Pond Filter

In my opinion, a UV clarifier is an indispensible partner for a good pond filter. Unfortunately I am often confronted with dangerous half truths about this subject. First of all we need to say that the operating principle is the same or similar for every make.

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A Good Start to the Garden Pond Season

The temperatures are slowly beginning to rise again and the nights are nearly frost-free. This is the right time to carry out a quick check in our garden shed.

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Did you know that UV-C water clarifiers can get limescale and then stop working?

If you’ve ever opened your UV-C water clarifier to find out why its effectiveness has diminished so much, you were probably surprised to find the glass tube around the UV-C bulb completely covered in a layer of limescale.

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safety instructions

  • safety instruction for technical devices
    • Filename:
spare parts
Customer reviews


Overall rating: 5.0
8 public review(s) for this product.

0 Reviews

8 more reviews in other languages

8 Reviews in other languages

LadyDiscus - Polish

w 24 godziny uv-c zrobiło rewolucje u mnie w akwarium! takiego efektu sie nie spodziewałam .Z całego serca polecam3 Lady Discus

Maharaja - Italian

Utilizzando questa favolosa lampada UV finalmente riesco a contrastare l'insorgenza di alghe ottenendo allo stesso tempo un acqua cristallina e sana. Infatti, grazie alla radiazione UV-C della lampada, alghe, batteri e altri agenti patogeni vengono uccisi senza apportare alcuna alterazione dei parametri dell'acqua e senza recare danno agli importantissimi batteri depuratori presenti nel filtro.

Di facile installazione si può montare in qualsiasi posizione. Io l'ho montata in verticale per efficenza di spazio collegandola all' OUT del filtro esterno CRISTALPROFI e1902 ottenendo così un acqua sana e pulita migliorando lo stato di salute dei miei Discus che seppur pesci meravigliosi sono allo stesso tempo molto delicati.

Consiglio vivamente di montarla su qualsiasi acquario.

aqua_mtc - German

Sehr guter UVC-Klärer. Zuverlässig, einfach in der Montage.

Vielseitig anwendbar. Verschiedene Schlauchgrößen ohne separate Adapter montierbar.

Sehr gute Reinigungsmöglichkeit, da sehr weit zerlegbar.

ShakaAnimalStudio - German

Ist nun seit ein paar Monaten im 650l Meerwasser verbaut und ich positives berichten. Gute Qualität, leicht zu montieren, dicht und macht das was sie machen soll! Einfach Top! Die nächste ist bereits im Haus und wird demnächst im Süßwasser verbaut. Freu mich schon drauf!

GarnelenTV - German

Schwebealgen? Keine Chance, für mich ist eine UVC Anlage ein MUSS in jedem Meerwasseraquarium, aber auch im Süßwasser hat es mir schon sehr geholfen Probleme vorzubeugen. Daher werde ich auch meine zukünftigen Aquarien mit den UVC Anlagen von JBL ausstatten.

Unterwasserwelt_Bautzen - German

Wie man es gewohnt ist, in Top Qualität und einfach zu installieren. Kann ich einfach nur empfehlen, da es einfach Super ist.

bennys riff welt - German

Hallo ich Nutze den für mein 500l Seewasser Aquarium und bin voll kommen zufrieden seit dem ich ihn dran habe keine ausfalle mehr mit Pünktchen

diskusmummy - German

Ich nutze den 36 Watt UVC zur Entkeimung meines 1000 Liter Diskus-Aquariums. Leider kann man hier keine Bilder hochladen, denn gerne würde ich einen Keimtest zeigen. Die Keimbelastung lieg bei 10²KBE/ml - das ist ein super Ergebnis. Natürlich gehören auch regelmäßige Wasserwechsel zu Wasserpflege aber in Kombination für mich die beste Lösung.

Im Lieferumfang sind alle nötigen Tüllen zum Anschließen dabei. Sogar Winkel. Die Compact-Variante passt prima vertikal in einen Unterschrank mit einer Höhe von 70cm.

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