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JBL PROTEMP S 300
Heating for aquariums, 300 W safety heater-stat with protective basket

Product information sheet Instructions
  • Heating for an ideal temperature in aquariums with 160 to 400 l content (100 – 120 cm length)
  • Easy to install: insert the heater into the protective basket, preselect the temperature on the dial, immerse in the aquarium, attach with suction cups to the internal aquarium pane
  • Precise temperature setting: dial covers temperature range 20 - 34 °C, control accuracy +/-0.5°C. Ideal temperature transfer: star-shaped heating element, made of ceramic
  • TÜV tested, watertight to 100 cm, unbreakable quartz safety glass with protection screen. With dry-running protection against electrical accidents
  • Package contents: safety heater-stat with protective basket, 300 W, 195 cm cable, 2 years guarantee (+2 years upon registration of the product)
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Instructions

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Product information

Heating for aquarium fish
Fish adapt to the ambient temperature. The life functions of cold-blooded animals sink with falling temperatures. The right aquarium temperature is therefore very important to ensure their problem-free food intake and a smooth functioning of their metabolism. Depending on the origin of the fish, the temperature they feel comfortable at varies.

Easy to install
Put the heater into the protective basket included. Preselect the required temperature using the temperature dial and immerse the heater in the water at least to the “min. water level“ line. Fasten with the suction cups. A control lamp lights up as soon as the heater is connected to the power supply. The heater can also be mounted horizontally, e.g. for turtle tanks.

Ideal temperature transfer
JBL’s safety heater thermostat ensures an ideal temperature transfer in the range between 20 - 34 °C. With the help of the dial a control accuracy of +/- 0.5 °C is ensured. The maximum attainable temperature depends on the water volume and the difference in temperature to the surroundings.

Safety heater thermostat
The protective basket in which the heater is embedded prevents the fish from being scorched. The heater is watertight, can be immersed to a depth of 100 cm and, with its 2 mm strong safety quartz glass, is very stable. If the water level sinks or the heater is removed from the water, a safety protection device in the heater interrupts the electric current and prevents overheating. The heater is TÜV certified.

Videos
Details

JBL PROTEMP S 300

Art. no.:
6042640
EAN Code:
4014162019134
Length:
37,5 cm
For:
160-400 l
Volume packaging:
2.25 l
Gross weight:
530 g
Net weight:
402 g
Weight factor:
1000
Packaging dimensions (l/h/w):
50/475/95 mm

Properties

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, Mussels, Newts, Panchaxes, Rainbowfish, Snails, Spiny eels, Terrapins, Tetra, Tropical terrapin, Veiltails, Water turtles, freshwater butterflyfish
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: 160-400 L (100-120cm)
Material: glass / ceramic / plastic (ABS) / metal
Colour: grey / black

Electronic label / illuminant

Mercury: No
Dimmable: No

Technical Data

capacity in litres:400 l
capacity from - to:160-400l
capacity tank length:100-120 cm
power output in Watt:300 W
Height:375 mm
Length:29 mm
Width:29 mm
diameter:29 mm
voltage:230 V
FAQ
When I touch the heating cable under water, it is only warm.

It is by all means correct that the JBL ProTemp S heating element only emits what is perceived to be pleasant warmth by the hand. The surrounding water causes the heat to be conducted away very quickly and passed on to the water. Therefore, the heating element is functioning properly. If it is taken out of the water, the glass immediately becomes very hot. The safety shut off is activated immediately. Nevertheless, the resulting heat must escape outside the water after the heating is switched off, which may cause the heater guard to become deformed, as there is no water to cool it. The safety thermoswitch in JBL ProTemp S heaters is by no means intended as an automatic control device which makes it unnecessary to pull the plug before a water change and, instead, is merely an additional safety precaution against accidents involving electricity. Due to its design, the heater may become very hot before the thermoswitch turns it off.

Is the basket available as a spare part, or do I need to buy a new heater?

The protective baskets are available as individual parts. You need the following to fully replace the basket, e.g. for the ProTemp S 200 W:

1 x 6043100 - End part
1 x 6043200 - Short middle part
1 x 6043300 - Long middle part with a suction cup
1 x 6043400 - Upper part with 2 suction cups

Any one of our retailers should be able to order these in case they do not have them in stock.

Is it possible that there is a series of JBL ProTemp S heaters with in/out intervals that are not adjusted properly?

According to technical specifications, our heaters have a control accuracy of +/- 05 °C. Taking measuring errors in temperature measurement for aquarium operation into account, the switching accuracy should be approx. 1 to max. 1.5 °C. If a heater has deviations of 5-7 °C, there is usually only one possible cause.

The heater is not adjusted properly, which can be determined by checking whether the heater has or has not a push button for readjusting (JBL has several different series). Otherwise it is defective. The heater is mounted in a spot that does not have sufficient flow of water.

Does the thermostatic switch in the JBL ProTemp S heater mean it is no longer necessary to disconnect the mains by pulling out the mains plug before a water change ?

The thermostatic switch in the JBL ProTemp S heater does not mean that it is no longer necessary to disconnect the mains by pulling out the mains plug before a water change. It is just an additional safety precaution against accidents with electricity. Due to its construction the heater can get very hot before the security switch switches off. This may cause a deformation of the protective basket.

Deformations have occurred on the protective baskets of the ProTemp S heater. What is the reason and what can I do about it ?

The protective baskets protect the ornamental fish against burns from the heating element’s surface.

When the heater is in operation it gives off heat to the surrounding water. With calcareous water, scale (precipitation of calcium carbonate) can form where the glass meets the water and this reduces the thermal dissipation. An excessive formation of scale may cause heat accumulation which can lead to overheating and a deformation of the protective baskets.

With hard starting water a regular decalcification of the heating elements e.g. with JBL Clean A or JBL pH Minus is recommended.

Blog (opinions & experiences)

JBL TV #58: Which fish and plants fit into a 100 cm aquarium?

Which fish fit into a 100 cm aquarium and which fish are not suitable?

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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 #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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JBL TV #19 Part 1: Aquarium Set-Up - Aquarium Technology - Where Do You Put The Heater And Filter?

Installing aquarium technology, where do you put the heater and filter?

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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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Heating in the aquarium. Heating rods vs. outdoor heaters

Our houses aren’t the only things to need heating. Our fish habitats, or aquariums, also need to be kept at a constant, feel-good temperature. This can vary from aquarium to aquarium and needs to be individually regulated.

Find out more

Display Accuracy vs. Measuring Accuracy - Different Results When Measuring Temperatures

You may find the differences that can arise when measuring the temperature with different measuring instruments and methods, confusing. Most people tend to trust a digital device more than an analog device. Is this justified?

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How to protect your heater and your fish

If you have ever touched an aquarium heater when it’s on, you’ll know not to do it again! Yet fish, especially sucker catfish and sucking barbs, have a habit of hanging on to heaters.

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Winter: Temperature Issues in the Aquarium

Not every aquarium is situated in a heated living space like your cozy living room. The temperature can be as low as 12 - 14 °C at night in some rooms of the house or apartment.

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Outline: Fertilisation in the Aquarium

The JBL plant care concept leads to vigorous and healthy growth even with the most demanding aquatic plants. JBL has all the components you need, whether it’s a fertiliser, a bottom substrate or a fully automatic CO2 fertiliser system.

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What is an Aqua-terrarium / Paludarium?

You’ve seen them in zoos. They are a combination of conventional terrariums and aquariums. On top there’s a rainforest, below there’s an aquarium.

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The Rainforest Terrarium Part 3 - Heating

Unlike in other original habitats of our terrarium animals the rainforest is characterized by its even temperatures.

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Press
03.09.2024

JBL heaters for discus fish

The Discus Championship 2024, held for the fifth time in Dortmund, relies on the reliable JBL PROTEMP s heater thermostats and JBL thermometers with an accuracy of +/- 1 °C to regulate the water temperature for the precious discus fish.

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27.10.2016

Now even more safety with the free JBL GarantiePlus

Buyers of JBL technical products can rest even more on the safe side now because JBL is offering them a guarantee claim for two additional years free of charge. Just register your product online within the 2-year manufacturer guarantee period.

Find out more
27.11.2012

Warming - Heating - Cooking

Regelheizer machen Sinn, zumindest, wenn die gewünschte Wassertemperatur über der Raumtemperatur liegen soll. Die meisten tropischen Zierfische fühlen sich zwischen 24 und 26 °C Wassertemperatur wohl.

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Laboratories and calculators

Online Hospital

Do you have ill fish and you don’t know what disease it is and how to treat it? Here you can diagnose diseases using photos or identification keys and you can find out where they come from and how to treat them. By showing you over 500 photos to identify and cure fish diseases, we enable you to find a diagnosis and solution.

Water Analysis Online Laboratory

Enter your water parameters and get an in-depth analysis of your values in a matter of seconds. You enter your water values – and we analyse! Here you have the opportunity to enter the measured water values directly into the JBL Online Laboratory. This will analyse your values and explain and submit corrective measures.
Reference guide (Themeworld)

GarantiePlus

With the guarantee extension JBL GarantiePlus you secure your extra-long extended 4-year guarantee from the date of purchase for your JBL product. Do not miss out on your extended guarantee claim!

Deficiency symptoms

Here’s how to prevent deficiency symptoms in fish and plants

Installation technical items

How and where in the aquarium do you fix and install technical items? Tips and tricks for the installation of all technical aquarium products

Heating and cooling

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

The marine aquarium

Holiday at the coral reef - in your own living room! Marine aquariums are the most exciting branch of aquatics

Biotope (habitat) aquarium types

A real piece of the Amazon or, with the Congo, a piece of the heart of Africa. A habitat (biotope) aquarium is a challenge. Can you emulate nature?

Aquascaping aquarium type JBL Dreamscape®

Mountains, valleys, meadows and fish! Create your dreamlike landscape under water with the Dreamscape® aquarium

Jungle aquarium type JBL Rio Pantanal®

A bit of jungle river in your living room. Lively underwater action! No problem with the JBL Rio Pantanal® aquarium

Rocky reef aquarium type JBL Malawi Rocks®

The fish of Lake Malawi are as colourful as the fish in the coral reefs. This aquarium brings a bit of freshwater reef into your living room

Goldfish aquarium type JBL Goldfish Paradise®

Lively goldfish in the aquarium enhance any room perfectly! Invite some new flatmates into your home with this goldfish aquarium.

Aquatic terrarium

A terrarium with an integrated water element is an aquatic terrarium, also referred to as a paladarium. Turtles, for example, feel very comfortable in them.
Download

Instructions

safety instructions

  • safety instruction for technical devices
    • Filename:
      JBL_Sicherheitshinweis_fuer_Technische_Geraete.pdf
    Download
spare parts

ProTemp S Suction Pads 

ProTemp S Protect (top) 

ProTemp S Protect (middle part, short) 

ProTemp S Protect (middle long +suction cup) 

ProTemp S Protect (end part) 

adapter UK for all flat-pin plugs 
accessories

PROCLEAN POWER 

Cleaner for CO2 diffusers and aquarium decorations

Customer reviews

Reviews

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

0 Reviews

7 more reviews in other languages

7 Reviews in other languages

A.Q.U.A.R.I.S.T.I.Komet - German
2022-04-07T17:38:57Z

Guter Heizstab für große Aquarien.

Hält zuverlässig die Temperatur die man eingestellt hat, bei richtiger Anwendung.

malawiaddiction - German
2022-03-07T19:21:57Z

Arbeitet sehr präzise und springt wenn richtig eingestellt nicht dauerhaft an.

Der Korb ist wirklich gut und bietet somit ein Schutz vor Verbrennung gerade wenn Welse im Becken sind sehr wichtig.

Im Becken mit dunklem Hintergrund ist der Heizstab samt Korb quasi Unsichtbar

M. Alparslan - German
2022-01-17T11:27:03Z

Habe es jetzt seit gut 6 Monaten im Betrieb . Arbeitet zuverlässig und Dank der schwarzen Schutzhülle fällt es optisch nicht auf .

Aquaklausi - German
2021-07-18T09:46:50Z

Arbeitet wunderbar! Tolles Produkt. Sehr gute Regelung der Temperatur. Top Verarbeitung.

malawidortmund - German
2021-04-07T13:32:02Z

Super Produkt, mit Sicherheit und Schutz das Aquarium aufwärmen lassen 👍🏼

diskusmummy - German
2021-03-16T07:35:35Z

Endlich ein Heizer mit Schutzkorb! Es gibt nichts schlimmeres als Verbrennungen am Fisch!

Ich nutze die die JBL ProTemp S in allen meinen Diskus-Aufzuchtbecken und bin wirklich sehr dankbar über den Schutzkorb. Kleine Diskusfische suchen oft Schutz unter Gegenständen. Auch hinter einem Heizer. Leider kommt es da oft zu Verbrennungen. Danke dafür!

Aquaklausi - German
2021-01-21T16:02:28Z

Benutze den Heizer für mein 400L Amazonastank Biotop-Aquascape.

Bin sehr zufrieden mit der Leistung. Die Temperatur im Becken wird sehr konstant gehalten.

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specialist dealers near you
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