Multi-functional cleaning: aquarium mulm sucker can clean the aquarium without changing the water, such as algae, fish feces and changing the water. Electric operation is very easy to switch or add water. The 3D filter design protects small fish and substrates from suction.^ Strong suction power: Electric aquarium cleaner can suck up to 520 liters/hour. reach, and with sufficient suction power, it can quickly vacuum fish manure and debris on the sand, which is more time-saving and labor-saving than manual vacuuming.^ ADJUSTABLE LENGTH: The fish tank submersible debris vacuum cleaner is height adjustable and the length is adjustable between 58-94cm. It can be used with aquariums of different heights. The aquarium is less than 1 meter in size and the water level is 20 x 75cm.^ Can be used for draining the aquarium: When you connect the hose to the outlet, the electric sludge vacuum kit can also be used as a water siphon for water changes, or to empty the aquarium when the hose is connected to the outlet.^ Diverse uses: The aquarium vacuum cleaner is suitable for different types of aquariums. Due to its two-stage water inlet pipe with extensions, it is suitable for large and small aquariums and can be extended if necessary.^