- 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