The External Filter e CP 401 - 1901 is a very gue choice. The filters are shipped fully assembled and filled with filter media. I myself pursuing the E1501 in my aquarium and am very happy with it. The filter can be set well in terms of flow, it is very easy to maintain and easy to handle. With only 20 watts of power consumption at 1400 liters of water circulation in the hour is a real savings, and powerhouse. I would always choose a JBL external filter for my aquarium.
