The BioCompact 25 internal filter filters water in small aquariums with a maximum volume of 25 litres very effectively. This is ensured by the large filter surface and the fine activated carbon sponge. The water flow rate is 120-240 l/h and can be individually regulated on the water diffuser. The filter works very quietly and is very energy-efficient with a maximum power consumption of 5 watts. With a net weight of 0.19 kg, the filter is particularly light. Thanks to its flat shape (120 × 43 × 47 mm), it can even be installed horizontally in paludariums. The internal filter is supplied as a complete set with a 1.5 m long power cable.