❤Extremely quiet pump takes water from the aquarium to the tank. It passes through all the filtration stages and then returns purified through a cascade system, oxygenating itself optimally. ❤ Feeding: 220V-240V 50Hz. Powerful : 3.5 W, max liters: 200 l/h ❤ These filters attach to the edge of the aquarium, leaving the body outside the backpack. They do not take up space in the aquarium and are ideal for small aquariums. ❤Innovative filtration technology. With their bold new image and success-oriented focus, these one-of-a-kind filters achieve maximum filtration levels with their high biological power, allowing all aquarium enthusiasts to keep them looking beautiful and healthy. /p> ❤ The filter is for the 10-30L fish tank. Works silent. The filter has two filter plates to operate. Filtering is better.