Ideal for complete aquarium cleaning or quick maintenance. Easily removes residue from the substrate without disturbing the lower layer of gravel. Please pay attention to the usage instructions on the video and detail page. Improper use can cause blockage. The automatic pump removes water and fills the aquarium with water. Adjust the height to suit your needs. This eco-friendly product supports aquatic life with a 'green' approach. This unit can be used in freshwater and saltwater aquariums with a water depth of up to approximately 70 cm. Product: Aquarium vacuum cleaner. Ideal for fast and efficient cleaning, it reduces and simplifies maintenance time. It effectively removes debris and other harmful particles without disturbing the lower gravel layer. Take care of your aquarium and aquatic life, improve filter performance, and help keep fish and plants healthy. Used as a vacuum cleaner and a water change system. Removes waste and harmful particles. Does not disturb the gravel layer. Designed for medium and large aquariums over 40 cm in height. The extension nozzle can be used for deeper aquariums. Tilt it to better clean gravel, change water, and remove waste. You will be able to clean the aquarium without any mess. Always keep the pump completely submerged; otherwise, it will stop working. Remove the filter element. Remove the end cover pieces from both ends of the filter element. Thoroughly rinse out any accumulated impurities under running water. Attention: The vacuum cleaner is suitable for freshwater and saltwater aquariums with a water depth of up to approximately 71 cm. The grain size of the aquarium gravel should not be less than 2 mm. Not suitable for cleaning a sandy bottom. Depending on the depth of the aquarium, you can add the extension tube or the extension nozzle. The pump must be positioned below the minimum waterline before starting it. If the impeller of the pump is blocked by debris, loosen the impeller nut counterclockwise and remove the cover, then clean the debris from the inside. It is recommended to change up to a maximum of 25% of the total water in your aquarium every 2 to 4 weeks.