When the filtering materials are dirty and the water flow decreases, in case of emergency, you can turn the new Knob (Xtender) and you do not need to clean the filter immediately, earning a few days until the next maintenance.
Price--> €159 features:
Aquarium Volume: 180-350L.
Pump debt: 1,050 L/h.
Elevation height: 1.8 m.
Filter Volume: 5l + 0, 5l (prefilter).
Includes EHEIM Mech Pro, Bio Mech and Substrat Pro.
Ideal for aquariums between 150 and 240 liters.