The newest Sera aquarium heaters are specifically designed for low aquariums. The 100 Watt version is suitable for aquariums from 70-100 liters.
This heating element can be easily mounted on the glass by using the suction cups. The aquarium heaters from eheim feature the latest technologies. Suitable for aquariums from 100-150 liters.
The Aquael Comfort Zone Fix are designed for maintaining aquarium water at a constant temperature of 25 degrees Celcius in the Aquarium. For aquariums of 75-100 liters.
With the Eheim thermocontrol-e heating element your fish get the right temperature even more precisely - in every aquarium. For aquariums from 100-150 liter.