The smallest Eheim external filter has all the advantages of the widely praised classic external filter technology. It is particularly suitable for compact aquariums up to 150 litres. With its ideal dimensions, this model can be placed anywhere. The supplied holder provides perfect support. The filter volume is fully utilized. This creates a correct ratio between filter volume and aquarium content. The filter can be filled with sponges and filter mats. Eheim recommends building up the filter with Eheim filter medium.