Description: o EasyCrystal(R) FilterPack Mechanical filtration: Double-layered Filter Floss Pads reliably remove even the tiniest particles. o Chemical filtration Special advanced carbon to eliminate water clouding and unpleasant odours o EasyCrystal(R) Filter BioFoam Biological filtration: Filter Foam with an extra large surface area for the growth of beneficial bacteriac o Powerful impeller (30l aquarium: 250l/h 60l aquarium: 300l/h)v o Durable suction cups