Eheim Thermocontrol 25W – 300W


Eheim heaters are great.

They are more efficient than many other aquarium heaters and are sold at a reasonable price.

The linked listing offers Eheim thermocontrol heaters from 25 to 300 Watts with prices ranging from £21.49 – £27.99.

Use the Eheim Thermocontrol guide below to check what size heater you require for your aquarium.

Check out our full write up on the Eheim Thermocontrol HERE.

SKU: B00FF5VLT4 Categories: ,


  • Precise temperature control – dial at the top of the heater (65-93F or 18-34C)
  • Heating function is indicated by an on/off control light
  • Chrome Nickel coil inside a shock-resistant shatterproof glass tube

Obvious ideas often are the best ones. For example, the aquarium heater as a rod. The heating rod is simply hung in the water and heats it.

It is true that the principle is still the same as decades ago, but a lot has changed in the meantime.

Today the EHEIM adjustable heater is an ultra-modern electronic thermal device with the best available technology.

A jacket made from special laboratory glass increases the heating surface, serves as a heat shield and ensures optimum even heat emission, no matter if you want to heat a 20 or a 1000 litre aquarium.

Eheim Product Number 3612110


Eheim Thermocontrol size guide:

25 W for Aquaria from 20 up to 25 l, Total length: 233 mm
50 W for Aquaria from 25 up to 60 l, Total length: 233 mm
75 W for Aquaria from 60 up to 100 l, Total length: 260 mm
100 W for Aquaria from 100 up to 150 l, Total length: 309 mm
125 W for Aquaria from 150 up to 200 l, Total length: 309 mm
150 W for Aquaria from 200 up to 300 l, Total length: 335 mm
200 W for Aquaria from 300 up to 400 l, Total length: 396 mm
250 W for Aquaria from 400 up to 600 l, Total length: 442 mm
300 W for Aquaria from 600 up to 1000 l, Total length: 496 mm


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