The OASE FiltoSmart Thermo 100 is a powerful and compact external filter with integrated heater for aquariums up to 100 litres. Thanks to the innovative combination of mechanical and biological filtration in combination with a large filter surface, the compact external filter ensures crystal clear water and a healthy aquarium climate. The OASE FiltoSmart 100 is also impressive for its quiet operation and versatile installation options. It comes complete with filter media and installation materials.OASE external filter FiltoSmart Thermo 100+ The 100W heater built into the filter housing ensures even temperature distribution throughout the aquarium without the need for a separate heater.+ The filter combines mechanical, biological and chemical cleaning for optimum water quality.+ The easily accessible pre-filter allows quick maintenance without having to open the entire filter.+ The slim design of the filter is ideal for small aquariums and takes up little space.+ The powerful yet energy