External heater for freshwater and marine aquariums from 160 to 600 l

  • In-line heater integrated into the hose of the external aquarium filter, removing the need for a heater INSIDE an Aquarium
  • Easy installation: cut through the hose from the external filter that feeds the water back into the aquarium, insert the external heater in between, insert the plug and set the water temperature you want
  • The integration in the filter circuit ensures a very even distribution of the water temperature with an accuracy of +/- 0.5 °C and a switching interval of 1.0 °C in the aquarium
  • LED display of the current and desired temperature. Interchangeable hose connections for 12/16, 16/22, and 19/25 mm with hose locks. Total length: 30.5 cm
  • Package contents: 1 in-line heater 500 W for aquariums from 160-600 l (100-150 cm) with hose connections for 12/16, 16/22 and 19/25 mm and cleaning brush
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Recommended retail price incl. VAT
Available from your specialist dealer.
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You can find this article at your specialist shop and online
Product information

Most aquarium fish come from tropical waters and need water temperatures between 22 and 30 °C. In community aquariums with fish/invertebrates from different regions, a water temperature of 24-26 °C has shown to be effective. 30 °C is only suitable for some fish breeding (e.g. discus fish). Many shrimp species come from cooler waters and do not tolerate temperatures of 25-30°C.

The water temperature should be set with an "adjustable heater" which regulates the temperature automatically. For this purpose, there are rod-shaped heaters which are fixed in the aquarium (JBL ProTemp s) in various wattages and external heaters/in-line heaters which are integrated in the water-returning hose of an external filter (JBL ProTemp e) in two wattages. The advantage of external heaters is that it is one less product to be placed INSIDE the aquarium and the distribution of heat in the aquarium is more even. In addition, the digital display of the external heater always clearly shows the current water temperature. The outdoor heaters can of course also be operated with a separate water pump.

Undergravel heating is NOT used to set the water temperature. An undergravel heating cable ensures a better flow of water through the substrate of the aquarium, as the heated water at the heating cable rises and colder water flows into the areas between the heating cables. Thus nutrients are flushed to the plant roots and ensure optimal plant growth. Undergravel heating cables must always be supplemented by a "main heater" (JBL ProTemp s or e).



Art. no.:
EAN Code:
Volume packaging:
2.600 l
Gross weight:
500.000 g
Net weight:
400 g
Weight factor:
Packaging dimensions (l/h/w):
85/350/90 mm

Technical Data

capacity in litres:600 l
capacity from - to:160-600l
capacity tank length:150 cm
power output in Watt:500 W
Height:295 mm
Length:90 mm
Width:80 mm
voltage:240 V
What water pressure are the PROTEMP e in-line heaters designed for?

This device may only be used for heating aquariums in the private area. For this purpose, the in-line heater is connected to an external filter or a feed pump. These systems are unpressurised systems which only use the principle of circulation and do not build up any pressure, as the inlet and outlet also provide an additional drain and the impeller does not build up any water pressure when pumping. The use of accessories or parts not recommended by the manufacturer can lead to hazardous situations and a loss of warranty. Installations on pressure pumps or directly on water pipes are therefore not possible.

Does the alignment of the external heater matter during its installation?

Yes, because temperature measuring requires constant contact with the water. When installing, please pay attention to the flow direction marked by arrows on the heater housing. Attach the heater to the suspension loop provided for this purpose in a position as vertical as possible with the flow direction pointing upwards. This is the only way to ensure that the device is vented and that the temperature measuring functions properly.

Where should you install the external heater?

First place the JBL PROTEMP e In-line heater on the outlet side of the external filter, before positioning the UV-C units, CO2 diffusers and other attachments. If this is not possible, you can still install the heater after the UV-C unit, but then only install diffusers behind it.

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Additional product information and downloads

safety instructions

  • safety instruction for technical devices
    • Filename:
spare parts

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