JBL PROTEMP Cooler x200 (gen 2)
Cooling fan for freshwater and marine aquariums from 60-200 l

  • Cools water temperature by 2 - 4 °C at higher ambient temperatures: cooling fan with modern cross-flow fan and broad air flow for aquariums
  • Easy to mount on the aquarium edge: pane thickness max. 2.4 cm. Air flow direction freely selectable and casing on mount rotatable by 360 °. Connect with power supply unit and plug power supply unit into the socket - the cooler is on
  • Cool water through air flow at the water surface = evaporation cooling. Can be extended with JBL CoolControl temperature control. 2nd Generation: quieter thanks to improved fan wheel bearing
  • Safety: 12 V extra-low voltage, safety cover grid. Power supply for all common mains voltages worldwide. With adjustable air jet angle
  • Package contents: 3 W cooling fan for aquariums, power supply unit with 150 cm cable leading to the cooling fan. Cylinder fan wheel 10 cm wide; casing width 18 cm, casing height 6 cm
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Price: 55,43 €
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Product information

Temperature control
Two important factors affect the water temperature in the aquarium: firstly the room temperature and secondly direct sunlight. If the room temperature in summer increases significantly, it is important to check the temperature in the aquarium regularly. Aim for 24-26 °C. Temperatures above 30 °C are a problem and can cause substantial damage to fish and plants. And never expose an aquarium to direct sunlight. The higher the temperature, the lower the oxygen content.

Easy to install
The bracket of the cooling fan is placed onto the aquarium rim (up to max. 2.4 cm thickness) and fixed with clamp screws.

Cools by evaporation
The JBL PROTEMP Coolers for freshwater and marine aquariums cool between 2-4 °C with the help of cross-flow fans. The air flow helps the warm water to evaporate at the water surface and thus generates evaporative cooling. This is comparable to the evaporation cooling effect when wet skin is exposed to the wind.

The water cooler has a safety cover grid and is operated with an extra-low voltage of 12 V.


JBL PROTEMP Cooler x200 (gen 2)

Art. no.:
EAN Code:
180 mm
for litres:
Volume packaging:
1.95 l
Gross weight:
453.2 g
Net weight:
340 g
Weight factor:
Packaging dimensions (l/h/w):
130/75/200 mm


Animal species: Arowana, Artemia, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Corals, Crayfish, Danions, Discus, Dwarf shrimps, Flowerhorn, Gobies, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Newts, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
Animal size: For all animal sizes
Animal age group: All aquarium and terrarium animals
Material: plastic (ABS) / metal (aluminium)
Colour: grey / black

Electronic label / illuminant

Mercury: No
Dimmable: No

Technical Data

capacity from - to:80-200l
capacity tank length:60-100 cm
power output in Watt:3 W
Height:60 mm
Length:180 mm
Width:60 mm
diameter:60 mm
voltage:230 V
How does the noise level of the new PROTEMP COOLER compare to the other coolers?

A lot of commercially available products, including our predecessor range, have two to four axial fans (depending on the model). The appearance is reminiscent of a PC fan. The design of the cross-flow fans used in the JBL PROTEMP COOLERS makes them run more smoothly and gives them a quieter air flow. Its one axis drive ensures a further reduction in noise. In models using similar technology, the bearing is typically based on sintered bushes. Thanks to a high-quality ball bearing, a dedicated bearing to give additional damping, plus a reworked bearing in the cross-flow fan wheel, the new PROTEMP COOLERS guarantee you greater stability. Rattling and squeaking are now a thing of the past.

Is rattling normal during operation?

The cross-flow fan provides an audible air flow that is uniform and must not rattle or clatter. However, if such a problem does occur, it could be an indication of damage from a fall or strong impacts on the enclosure wall. Check that the cross-flow fan is correctly mounted or if the housing is incorrectly assembled. If these are not the causes your ProTemp Cooler must be returned to the factory for inspection and repair by the JBL customer service.

Can I operate two coolers with one ProTemp CoolControl?

The ProTemp CoolControl is connected between the power supply and the ProTemp Cooler. It is therefore not possible to connect two coolers to one controller. Each Cooler needs its own controller.

Can the CoolControl also regulate the new ProTemp Cooler x200 and x300 (generation 2)?

Yes, the CoolControl of the predecessor range can also regulate the new ProTemp Cooler x200 and x300 (generation 2) aquarium coolers.

The cooler does not cool down the aquarium

JBL ProTemp Coolers cool the water temperature by 2-4 °C in high ambient temperatures. To achieve this with this product, it’s important the maximum recommended aquarium volume is adhered to. Please note that the cooling effect only occurs when the cooler is in operation and that the system needs to have been running continuously for a few hours beforehand. The air flow needs to be directed across the entire width of the aquarium and be at a 45° angle to the water surface. If only a part of the water surface is ventilated or the angle is set to 90°, the desired effect will be lost or greatly reduced. The housing can be rotated 360°.

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Blog (opinions & experiences)

Take part in the JBL Beach Party competition 2023

The last warm days of summer are coming to an end. Take part now and make sure of your chance to win a COOL pack for your aquarium.

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Summer heat - But not in the aquarium, please!

If you own an aquarium you’ll be asking yourself what effects the heat has on your aquarium and on your fish. We’ll tell you and explain what to do.

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JBL TV #54 The right water temperature – all the facts about temperature in the aquarium

A conversation with the chief biologist of the Sealife Centre in Speyer about issues which can arise in some water temperatures.

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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 #48: Fish also need to breathe - measuring and increasing the oxygen content (O2)

Many plants, high temperatures or the use of medicines and anti-algae agents can quickly become a problem.

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JBL TV #41: Heat wave in the aquarium: The effective and inexpensive method for cooling the water

When the aquarium water temperatures are heading towards 30 °C in summer, it’s high time to add a cooling system.

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Cooling the aquarium in summer – Reduce the water temperature with the JBL PROTEMP COOLER x200

30 °C is the maximum water temperature for aquariums. Fish and plants can tolerate 30 °C for a short time, but the invertebrates in seawater soon die after a very short time.

Find out more

Tips for cooling the aquarium - lowering the temperature

How do high temperatures affect our aquarium fish? And what can you do about it? Let us tell you!

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JBL TV #24: Aquarium heaters and aquarium coolers

What temperatures do our aquarium inhabitants have in the wild? How can you heat and cool your aquarium simply and effectively?

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Caution, Summer Heat! A Reason for Scaremongering?

You can’t prevent the temperature in your aquarium from rising. No matter what measures you take your living room will warm up on hot summer days and can even go over 30° C. So what can you do?

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Cooling Aquariums – Summer Heat in Aquariums

Summer means sweat, because even within our homes the temperature rises steadily. This can also be discerned in the aquarium.

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JBL aquarium cooler with improved technology

The JBL PROTEMP COOLERS are very popular in the hot summer months. They cool heated aquariums by up to 4 °C by generating evaporative cooling at the water surface and thus ensure the survival of fish, invertebrates and plants in the aquarium.

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Reference guide (Themeworld)

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Heating and cooling

Why is 25 °C ideal? This is how to heat or cool aquarium water


safety instructions

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


Overall rating: 4.8
12 public review(s) for this product.

1 Review


A must have product if you want to beat the heat and avoid algae bloom. You can drop your tanks temperature easily. I highly recommend you to buy the cool control too, it makes your life so much easier.

11 more reviews in other languages

11 Reviews in other languages

_mister_krabss_ - German

tefanDerksS - Dutch

Super product, koelt erg goed

S. Tejera Galindo - Spanish

Su instalación es muy sencilla y es una gran ayuda para el verano y las época de calor.

K. Hörry - German

Habe wie die meisten im Sommer Probleme mit hohen Temperaturen im Aquarium angefangen habe ich mit 26.9 grad nach einer 3/4 Stunde war die Temperatur schon auf 26.3 Grad und das gered ist auch leise bin von der Preis Leistung zufrieden.

bennys riff welt - German

Super Leise und echt klasse für kleine Aquarien bin sehr zufrieden mit dem

C. Tsotsoglou - German

Bekämpft die Hitze gut vibriert aber etwas.

Overall ein gutes Produkt.

Comment from JBL:

Danke für deine Bewertung. Prüfe bitte ob die Walzenturbine richtig gelagert ist oder das Gehäuse nicht richtig zusammengesteckt ist. Gerne hilft unser Support weiter. www.jbl.de/support

Malawi-Cichliden-Portal - German

Ich habe den JBL PROTEMP Cooler am Aufzuchtbecken im Einsatz, er ist ein feiner Helfer während der heissen Sommerzeit.

Er ist Stromsparend und Kühlt mein Aquarium in den heissen Sommertagen 3-4 Grad runter. Der Lüfter ist sehr ruhig und lässt sich Kinderleicht anbringen.

Ich finde ihn Top, nur schade das es den Kühler nicht für Becken ab 1000 Liter gibt.

tropheus_italia - Italian

Ottima ventola di raffreddamento, in pochi minuti mi ha rinfrescato l’acquario,veramente efficace!

aquaboxx - German

Super Produkt! Angenehm leise und kühlt sehr gut!

aqua_aktiv - German

Ich würde wen ich könnte dem produkt eine 3,5 geben aufgrund dessen das man es nicht benutzen kann wen das aquarium zu hoch ist weil das gerät wo man die temperatur einstellt direkt hinterm aquarium hängt wo man eben nicht dran kommt und man kann es nicht an der hinter scheibe montieren wen es "vernünftig" an der wand steht weil es in der tiefe zu lang ist das ist sehr schade weil es sonst vom technischen her top ist ;/

Thomas_aquascapingcz - Czech

Byl jsem skeptický když jsem držel tento výrobek v ruce, ale po namontování jsem se nestačil divit. Za 1 hodinu mi tento ventilátor ochladil vodu o 2 stupně (35l akvárium). jediné mínus tohoto výrobku je vetší hluk při chlazení, ale klady převyšují tento jediný záporný bod. všem doporučuji vyzkoušet!!

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